Dr. Kawashima is a character from the Brain Age series. Dr. Kawashima is a Japanese neuroscientist known for his appearances in the Brain Age series of video games for the Nintendo DS and Nintendo 3DS.
In Super Smash Bros. 3DS/Wii U
Dr. Kawashima makes his debut as an Assist Trophy. Once he is summoned, he will fly off the screen and never be seen again. However, bubbles containing numbers will float in from the blast lines. The numbers will not hurt the players, and players can redirect the numbers' trajectory.
If the numbers combined are greater than 10, it will create a small explosion, similar to throwing most explosive items. However, if the numbers combined equal 10, it will create an explosion similar to a Smart Bomb.
Dr. Ryuta Kawashima is the neuroscientist behind the Brain Age series. In this game, he sends numbers 1 to 9 flying onto the screen to crash into one another. If two colliding numbers add up to 10 or more, they'll explode. If the two numbers total 10 exactly, the explosion will be even more impressive!
DS - Brain Age: Train Your Brain in Minutes a Day! (04/2006)
DS - Brain Age 2: More Training in Minutes a Day! (08/2007)