Is Pikachu on a diet?


I noticed that Pikachu evolved a little over time.  
I wonder why he changed his form so much, so [I'm a bit worried about
Pikachu](https://i.stack.imgur.com/YGF8P.png). ![enter image description
here](https://i.stack.imgur.com/xB6XY.jpg)




It's most likely a matter of different character designers over the different
generations of the franchise. The original design was created by [Game Freak's
(original game's designers) character development team and finalized by artist
Ken Sugimori](http://en.wikipedia.org/wiki/Pikachu#Concept_and_design). The
[games themselves had changes in Pikachu's
designs](http://bulbanews.bulbagarden.net/wiki/Pok%C3%A9mon_sprites,_art_evolve_over_the_years),
which were in turn mirrored by the anime:

![enter image description here](https://i.stack.imgur.com/Ewpra.png) "Green
and Red", 1996

![enter image description here](https://i.stack.imgur.com/ZvZIJ.png) "Blue",
1996

![enter image description here](https://i.stack.imgur.com/IRCPR.png) "Yellow",
1998

![enter image description here](https://i.stack.imgur.com/lzH8U.png) "Gold",
1999

![enter image description here](https://i.stack.imgur.com/kmNwQ.png) "Ruby and
Sapphire", 2002

![enter image description here](https://i.stack.imgur.com/W5MYq.png) "Diamond
and Pearl", 2006

![enter image description here](https://i.stack.imgur.com/Juuwz.png)
"Platinum", 2008

![enter image description here](https://i.stack.imgur.com/zHl1U.png)
"HeartGold and SoulSilver", 2009

Ken Sugimori is also one of the character designers for the first [TV series
from 1997](http://www.animenewsnetwork.com/encyclopedia/anime.php?id=270). In
2002, [Pokemon
Advance](http://www.animenewsnetwork.com/encyclopedia/anime.php?id=1873) had
Sayuri Ichiishi as the character designer. And in 2006, [Pocket
Monsters](http://www.animenewsnetwork.com/encyclopedia/anime.php?id=6836) and
2010's [Black and
White](http://www.animenewsnetwork.com/encyclopedia/anime.php?id=11685) has
Toshiya Yamada in charge of character designs.

![enter image description here](https://i.stack.imgur.com/SYots.png) from the
"Advance" generation




It's most likely a matter of different character designers over the different
generations of the franchise. The original design was created by [Game Freak's
(original game's designers) character development team and finalized by artist
Ken Sugimori](http://en.wikipedia.org/wiki/Pikachu#Concept_and_design). The
[games themselves had changes in Pikachu's
designs](http://bulbanews.bulbagarden.net/wiki/Pok%C3%A9mon_sprites,_art_evolve_over_the_years),
which were in turn mirrored by the anime:

![enter image description here](https://i.stack.imgur.com/Ewpra.png) "Green
and Red", 1996

![enter image description here](https://i.stack.imgur.com/ZvZIJ.png) "Blue",
1996

![enter image description here](https://i.stack.imgur.com/IRCPR.png) "Yellow",
1998

![enter image description here](https://i.stack.imgur.com/lzH8U.png) "Gold",
1999

![enter image description here](https://i.stack.imgur.com/kmNwQ.png) "Ruby and
Sapphire", 2002

![enter image description here](https://i.stack.imgur.com/W5MYq.png) "Diamond
and Pearl", 2006

![enter image description here](https://i.stack.imgur.com/Juuwz.png)
"Platinum", 2008

![enter image description here](https://i.stack.imgur.com/zHl1U.png)
"HeartGold and SoulSilver", 2009

Ken Sugimori is also one of the character designers for the first [TV series
from 1997](http://www.animenewsnetwork.com/encyclopedia/anime.php?id=270). In
2002, [Pokemon
Advance](http://www.animenewsnetwork.com/encyclopedia/anime.php?id=1873) had
Sayuri Ichiishi as the character designer. And in 2006, [Pocket
Monsters](http://www.animenewsnetwork.com/encyclopedia/anime.php?id=6836) and
2010's [Black and
White](http://www.animenewsnetwork.com/encyclopedia/anime.php?id=11685) has
Toshiya Yamada in charge of character designs.

![enter image description here](https://i.stack.imgur.com/SYots.png) from the
"Advance" generation

