Bowser - Smash Bros Brawl Guide - IGN

Mario's had one primary nemesis since the NES days, and that nemesis is none other than Bowser. Bowser is the King of the Koopas, a race of evil turtles

GameSpy: Super Smash Brothers Brawl All We Know - Page 5

Super Smash Bros. Brawl UK Review - IGN

Giga Bowser, Smashpedia

Jigglypuff - Super Smash Bros. Melee Guide - IGN

Mario Galaxy - Super Smash Bros. for Wii U / 3DS Guide - IGN

Super Smash Bros. Brawl - SmashWiki, the Super Smash Bros. wiki

SSB History and All Smash Games Ranked

Yoshi - Project M Guide - IGN

Bowser (character), Neo Encyclopedia Wiki

Mushroomy Kingdom - Super Smash Bros. Ultimate Guide - IGN

Characters and Roster - Super Smash Bros. Ultimate Guide - IGN

Super Smash Bros. for Wii U / 3DS Guide - IGN

Smash Bros. DOJO!!