Slime Mori Mori Dragon Quest: Shōgeki no Shippo Dan
Slime Mori Mori Dragon Quest: Shōgeki no Shippo Dan is the first game of the Slime series of action-adventure Dragon Quest spin-off games. Developed by Square Enix, it was only released in Japan for the Game Boy Advance in 2003.
During the game, you fight Dragon Jr. as a boss. Dragon Jr. will inflate before spitting out fire balls. After taking some damage, Dragon Jr. drinks all of the water in the ground, swelling up to a large size. After attacking the bloated Dragon Jr. enough times, he will spit out the water and return to normal. After repeating this process a few times, Dragon Jr. will finally be defeated, spewing out the water and flying around like a deflating balloon.