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HTML 

              
                <div class="ground"></div>
<div class="mountain-one">
  <div class="mountain-left"></div>
  <div class="mountain-right"></div>
</div>
<div class="mountain-two">
  <div class="mountain-left"></div>
  <div class="mountain-right"></div>
</div>
<div class="tree-one">
  <div class="trunk"></div>
  <div class="shrub shrub-one"></div>
  <div class="shrub shrub-two"></div>
  <div class="shrub shrub-three"></div>
</div>
<div class="tree-two">
  <div class="trunk"></div>
  <div class="shrub shrub-one"></div>
  <div class="shrub shrub-two"></div>
  <div class="shrub shrub-three"></div>
</div>
<div class="tree-three">
  <div class="trunk"></div>
  <div class="shrub shrub-one"></div>
  <div class="shrub shrub-two"></div>
  <div class="shrub shrub-three"></div>
</div>
<div class="tree-four">
  <div class="trunk"></div>
  <div class="shrub shrub-one"></div>
  <div class="shrub shrub-two"></div>
  <div class="shrub shrub-three"></div>
  <div class="water"></div>
</div>
<div class="porygon-wrapper">
  <div class="tail-wrapper">
    <div class="tail-top"></div>
    <div class="tail-bottom"></div>
  </div>
  <div class="leg-wrapper left-leg">
    <div class="leg-side"></div>
    <div class="leg-top"></div>
    <div class="leg-front"></div>
  </div>
  <div class="body-wrapper">
    <div class="neck"></div>
    <div class="body-back-bottom"></div>
    <div class="body-back-top"></div>
    <div class="body-front-highlight"></div>
    <div class="body-front-top"></div>
    <div class="body-front-bottom"></div>
  </div>
  <div class="head-wrapper">
    <div class="back-head-line"></div>
    <div class="back-head-bottom"></div>
    <div class="back-head-top"></div>
    <div class="eye eye-left"></div>
    <div class="bottom-head"></div>
    <div class="side-head"></div>
    <div class="mid-head"></div>
    <div class="nose"></div>
    <div class="eye eye-right">
      <span class="eye-ball"></span>
    </div>
  </div>
  <div class="leg-wrapper right-leg">
    <div class="leg-side"></div>
    <div class="leg-top"></div>
    <div class="leg-front"></div>
  </div>
</div>
!

CSS 

              
                :root {
  --black: #111;
  --white: #fff;
  --sky: skyblue;
  --grass-top: #85b92f;
  --grass: #99ce86;

  --mountain-left: #86cd29;
  --mountain-right: #5db231;

  --shrub: #2f9228;
  --shrub-shade: #285f24;
  --trunk: #61483e;
  --trunk-shade: #503b33;
  --water: #9097cc;

  --pink-one: #f897ab;
  --pink-two: #f97d88;
  --pink-three: #d87478;
  --pink-four: #ce6d7a;
  --neck: #c3737e;

  --blue-one: #c3e1ec;
  --blue-two: #95d3cd;
  --blue-three: #8db7b8;
  --blue-four: #769995;
  --blue-five: #536866;
}

body {
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  margin: 0;
  padding: 0;
  width: 100%;
  min-height: 100vh;
  background-color: var(--sky);
  background: linear-gradient(to bottom, var(--sky) 0%, var(--white)100%);
}

.ground {
  display: block;
  width: 100%;
  height: calc(65vh + 1px);
  position: absolute;
  bottom: -1px;
  left: 0;
  right: 0;
  background: linear-gradient(to bottom, var(--grass-top) 0%, var(--grass)100%);
}

.mountain-one {
  position: absolute;
  bottom: 65vh;
  right: 120vh;
  transform: scaleY(0.7);
  transform-origin: 50% 100%;
}

.mountain-two {
  position: absolute;
  bottom: 65vh;
  right: 90vh;
}

.mountain-left {
  border-bottom: 180px solid var(--mountain-left);
  border-left: 260px inset transparent;
  border-right: 260px inset transparent;
}

.mountain-right {
  position: absolute;
  top: 0;
  right: 76px;
  border-bottom: 180px solid var(--mountain-right);
  border-left: 0 inset transparent;
  border-right: 104px inset transparent;
  transform: skew(42deg);
}

.tree-one {
  position: absolute;
  bottom: 60vh;
  right: 23vh;
  transform-origin: 50% 100%;
}

.tree-two {
  position: absolute;
  bottom: 55vh;
  right: 42vh;
  z-index: 5;
  transform: scaleY(1.2);
  transform-origin: 50% 100%;
}

.tree-three {
  position: absolute;
  bottom: 60vh;
  right: 55vh;
  transform: scale(0.8);
  transform-origin: 50% 100%;
}

.tree-four {
  position: absolute;
  bottom: 50vh;
  left: 0;
  transform: scale(2);
  transform-origin: 50% 100%;
}

.trunk {
  width: 25px;
  height: 100px;
  position: relative;
  right: 6px;
  background-color: var(--trunk);
}

.trunk:after {
  content: '';
  width: 6px;
  height: 100%;
  position: absolute;
  top: 0;
  right: 0;
  background-color: var(--trunk-shade);
}

.shrub {
  position: absolute;
  border-bottom: 60px solid var(--shrub);
  border-left: 80px inset transparent;
  border-right: 80px inset transparent;
}

.shrub:after {
  content: '';
  position: absolute;
  top: 0;
  right: -25px;
  border-bottom: 50px solid var(--shrub-shade);
  border-left: 10px inset transparent;
  border-right: 10px inset transparent;
  transform: skewX(30deg);
}

.shrub-one {
  top: -28px;
  right: -62px;
}

.shrub-one:after {
  right: -41px;
  border-bottom-width: 60px;
  border-left-width: 28px;
  border-right-width: 0px;
  transform: skewX(52deg);
}

.shrub-two {
  top: -68px;
  right: -42px;
  border-left-width: 60px;
  border-right-width: 60px;
}

.shrub-two:after {
  right: -35px;
  border-bottom-width: 60px;
  border-left-width: 16px;
  transform: skewX(40deg);
}

.shrub-three {
  top: -98px;
  right: -22px;
  border-bottom-width: 50px;
  border-left-width: 40px;
  border-right-width: 40px;
}

.water {
  position: absolute;
  top: 105px;
  left: -215px;
  width: 380px;
  height: 50px;
  border-radius: 50%;
  background-color: var(--water);
}

.water:after {
  content: '';
  width: 55px;
  height: 28px;
  position: absolute;
  bottom: -18px;
  right: 137px;
  border-radius: 50% 0;
  transform: skew(-79deg);
  background-color: var(--water);
}

.porygon-wrapper {
  display: block;
  width: 660px;
  height: 520px;
  position: relative;
  z-index: 50;
  cursor: pointer;
}

.porygon-wrapper:hover .tail-wrapper,
.porygon-wrapper:hover .head-wrapper,
.porygon-wrapper:hover .leg-wrapper{
  animation-play-state: running;
}

.porygon-wrapper:hover .eye-ball {
  border-bottom: 4px solid var(--black);
  border-right: 4px solid var(--black);
  width: 15px;
  height: 15px;
  border-radius: 0;
  transform: rotate(-111deg);
  background-color: transparent;
}

.head-wrapper {
  position: absolute;
  top: 38px;
  right: 272px;
  transform: rotate(-13deg);
  will-change: transform;
  animation: head-bounce 0.5s linear;
  animation-direction: alternate-reverse;
  animation-iteration-count: infinite;
  animation-play-state: paused;
  animation-fill-mode: forwards;
}

.mid-head {
  position: absolute;
  top: -5px;
  left: -204px;
  transform: rotate(-34deg) skew(30deg);
  width: 235px;
  height: 54px;
  background-color: var(--pink-one);
}

.mid-head:after {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  width: 90px;
  height: 100%;
  background-color: var(--blue-one);
}

.back-head-line {
  position: absolute;
  top: -23px;
  right: -27px;
  width: 147px;
  height: 4px;
  transform: rotate(26deg);
  background-color: var(--pink-two);
}

.back-head-bottom {
  position: absolute;
  top: 77px;
  right: -18px;
  width: 61px;
  height: 83px;
  transform: rotate(-73deg) skew(39deg);
  background-color: var(--pink-four);

}

.back-head-bottom:after {
  content: '';
  position: absolute;
  width: 100%;
  top: -10px;
  right: -34px;
  height: 100%;
  transform: rotate(40deg);
  background-color: var(--pink-four);
}

.back-head-top {
  height: 100%;
  position: absolute;
  top: -51px;
  left: 61px;
  border-top: 45px inset transparent;
  border-bottom: 42px inset transparent;
  border-right: 53px solid var(--pink-two);
  transform: rotate(-250deg);
}

.side-head {
  position: absolute;
  top: 16px;
  left: -175px;
  transform: rotate(-25deg);
  width: 0;
  height: 0;
  border-top: 40px inset transparent;
  border-bottom: 40px inset transparent;
  border-right: 230px solid var(--pink-two);
}

.side-head:after {
  content: '';
  position: absolute;
  top: -20px;
  left: -2px;
  border-top: 19px inset transparent;
  border-bottom: 19px inset transparent;
  border-right: 100px solid var(--blue-two);
}

.bottom-head {
  position: absolute;
  height: 18%;
  top: 32px;
  left: -159px;
  border-top: 72px inset transparent;
  border-bottom: 54px inset transparent;
  border-right: 217px solid var(--pink-three);
  transform: rotate(0deg) skew(-23deg);
}

.bottom-head:after {
  content: '';
  height: 100%;
  position: absolute;
  top: -84px;
  left: 4px;
  border-top: 86px inset transparent;
  border-bottom: 20px inset transparent;
  border-right: 78px solid var(--blue-three);
}

.nose {
  width: 65px;
  height: 20px;
  position: absolute;
  top: 87px;
  left: -213px;
  transform: rotate(22deg) skew(26deg);
  background-color: var(--blue-four);
}

.eye {
  position: relative;
  width: 100px;
  height: 57.74px;
  background-color: var(--white);
  transform: skew(12deg);
  box-sizing: border-box;
}

.eye-left {
  position: absolute;
  top: -29px;
  left: -58px;
}

.eye-ball {
  width: 15px;
  height: 15px;
  border-radius: 50%;
  position: absolute;
  top: 25px;
  left: 30px;
  z-index: 5;
  background-color: var(--black);
}

.eye:before,
.eye:after {
  content: '';
  position: absolute;
  width: 0;
  border-left: 50px inset transparent;
  border-right: 50px inset transparent;
}

.eye:before {
  bottom: 100%;
  border-bottom: 28.87px solid var(--white);
}

.eye:after {
  top: 100%;
  width: 0;
  border-top: 28.87px solid var(--white);
}

.neck {
  position: absolute;
  top: 194px;
  right: 267px;
  border-top: 38px solid var(--neck);
  border-left: 113px inset transparent;
  border-right: 62px inset transparent;
  transform: rotate(-2deg);
}

.body-back-bottom {
  position: absolute;
  width: 120px;
  top: 338px;
  right: 149px;
  transform: rotate(-17deg) skew(-15deg);
  border-top: 70px solid var(--pink-four);
  border-left: 35px inset transparent;
  border-right: 64px inset transparent;
}

.body-back-top {
  position: absolute;
  width: 130px;
  top: 206px;
  right: 191px;
  transform: rotate(-17deg) skew(17deg);
  border-bottom: 142px solid var(--pink-one);
  border-left: 66px inset transparent;
  border-right: 30px inset transparent;
}

.body-front-highlight {
  position: absolute;
  top: 216px;
  right: 317px;
  transform: skew(-2deg);
  border-left: 42px solid var(--blue-two);
  border-top: 72px inset transparent;
  border-bottom: 81px inset transparent;
}

.body-front-top {
  position: absolute;
  width: 91px;
  top: 203px;
  right: 341px;
  transform: rotate(13deg) skew(-1deg);
  border-bottom: 150px solid var(--blue-one);
  border-left: 51px inset transparent;
  border-right: 30px inset transparent;
}

.body-front-bottom {
  position: absolute;
  width: 128px;
  top: 359px;
  right: 328px;
  transform: rotate(13deg) skew(56deg);
  border-top: 52px solid var(--blue-four);
  border-left: 14px inset transparent;
  border-right: 30px inset transparent;
}

.leg-wrapper {
  will-change: transform;
  animation: leg-bounce 0.5s linear;
  animation-direction: alternate;
  animation-iteration-count: infinite;
  animation-play-state: paused;
  animation-fill-mode: forwards;
}

.left-leg {
  position: relative;
  top: 0;
  left: -265px;
  transform-origin: 461px 387px;
}

.right-leg {
  transform: rotate(-14deg);
  transform-origin: 486px 422px;
  animation-direction: alternate-reverse;
}

.left-leg .leg-top,
.right-leg .leg-top {
  position: absolute;
  top: 308px;
  right: 169px;
  transform: rotate(-28deg) skew(41deg);
  width: 125px;
  height: 50px;
  background-color: var(--blue-one);
}

.left-leg .leg-front,
.right-leg .leg-front {
  width: 68px;
  height: 30px;
  position: absolute;
  top: 360px;
  right: 257px;
  transform: rotate(20deg) skew(-2deg);
  background-color: var(--blue-two);
}

.left-leg .leg-side,
.right-leg .leg-side {
  position: absolute;
  width: 155px;
  height: 45px;
  top: 384px;
  right: 109px;
  background-color: var(--blue-three);
  transform: rotate(21deg) skew(5deg);
}

.left-leg .leg-side:after,
.right-leg .leg-side:after {
  content: '';
  width: 69px;
  position: absolute;
  top: -77px;
  left: -32px;
  border-bottom: 78px solid var(--blue-three);
  border-left: 67px inset transparent;
  border-right: 51px inset transparent;
}


.right-leg .leg-top {
  position: absolute;
  top: 308px;
  right: 169px;
  transform: rotate(-28deg) skew(41deg);
  width: 125px;
  height: 50px;
  background-color: var(--blue-one);
}

.tail-wrapper {
  will-change: transform;
  animation: head-bounce 0.5s linear;
  animation-direction: alternate-reverse;
  animation-iteration-count: infinite;
  transform-origin: 653px 283px;
  animation-play-state: paused;
  animation-fill-mode: forwards;
}

.tail-top {
  position: absolute;
  width: 8px;
  top: 111px;
  right: 139px;
  transform: rotate(31deg) skew(-5deg);
  border-bottom: 166px solid var(--blue-one);
  border-left: 26px inset transparent;
  border-right: 26px inset transparent;
}

.tail-bottom {
  position: absolute;
  width: 8px;
  top: 130px;
  right: 124px;
  transform: rotate(52deg) skew(25deg);
  border-bottom: 160px solid var(--blue-three);
  border-left: 26px inset transparent;
  border-right: 26px inset transparent;
}


@keyframes leg-bounce {
  0% {
    transform: translate3d(0px,0px,0px) rotate(-10deg);

  }

  100% {
    transform: translate3d(0px,0px,0px) rotate(10deg);
  }
}

@keyframes head-bounce {
  0% {
    transform: translate3d(0px,0px,0px) rotate(-10deg);

  }

  100% {
    transform: translate3d(0px,0px,0px) rotate(-18deg);
  }
}

/* Responsive */
@media screen and (max-height: 770px) {
  .porygon-wrapper {
    transform: scale(0.8) translateY(50px);
    transform-origin: 300px;
  }
}

@media screen and (max-width: 1450px) {
  .tree-four {
    display: none;
  }
}

@media screen and (max-width: 700px) {
  body {
    overflow: hidden;
  }

  .porygon-wrapper {
    transform: scale(0.4) translateY(150px);
    transform-origin: 300px;
  }

  .tail-wrapper {
    transform-origin: 286px 311px;
  }

  .right-leg {
    transform-origin: 94px 249px;
  }
}
!

JS
!
999px

Console