GO FAT EGGMAN!! BOO FATASS BOWSER!!
This is a fight between two fat guys that I hate, but I was rooting for Robotnik 'cuz I hate that dumbass fatass turtle Bowser!!
just some things I'll go over about the cameos and something that went on:
Bowser can't transform into Gaga Bowser 'cuz Gaga Bowser is not a Mario character(look at his emblum. It's a smash emblem). Master Hand has created Gaga Bowser. They are two totaly different people (fatass turtles).
Bowser is way fatter than mario is (mario isn't all that fat unless you're obsessed with SMB3 witch is one of my least favorite Mario games). Use the more cooler Mario sprite from Super Mario World.
Yoshi doesn't hate or even dislike mario in any way. Mario and Donkey Kong Patched things up over the years too.
Eggman was however quite acurate in that toon, so I'll give you that.
It's not Peachy, it's Princess Peach, PRINCESS of the mushroom kingdom (atleast you didn't say MarioLand like some of the retards here). He is also the father of Bowser jr, and the Koopalings were killed off by Mario & Luigi. Another reason why he kidnaps Peach is that he's a rapest. He's also a bastard (child without a father..adult without a father I mean).
This was well animated and the fights were realy good! Just do some research before you do cameos on anyother Mario character (or just ask me. I'm a wiz at Super Mario relaited stuff!).