Dr. Kawashima

Dr. Kawashima (, Professor Kawashima) is the host of the series. He appears in Super Smash Bros. 4 as an Assist Trophy.

Origin
(, Kawashima Ryuta) is a real-world neuroscientist from, , who is known for his studies on the mapping of the various regions of the human brain and the effects of age on one's ability to learn. His most well-known work is a book entitled , which claimed that continued activities that stimulate the brain, such as basic mathematics and reading aloud, could be used to stave off the mental effects of aging. The book became a success, particularly in Japan, and his work was later adapted as a video game series by Nintendo, entitled Brain Age. In the games, Dr. Kawashima appears as a polygonal head, acting as a trainer for the player.

In Super Smash Bros. Brawl
Dr. Kawashima is mentioned by name in the PAL version of Brawl in the title of the music track "Dr Kawashima's Brain Training: How Old Is Your Brain?", referred to as "" in the NTSC version. This is to maintain consistency with the PAL region title of the Brain Age series, in which Dr. Kawashima is named.

As an Assist Trophy
Dr. Kawashima appears in both versions as an Assist Trophy. When released, he floats into the background. Once he is settled, large numbers from 1 to 9 will fly vertically and horizontally across the screen at random. The numbers do not hurt fighters but can deflected 90 degrees by their attacks. If two numbers collide, they will be added together, merging into a single number equal to their sum; if the result is 10 or more, the new number will then explode after a short delay, with a significantly larger explosion similar to the Smart Bomb if the result is 10 exactly. Uncommonly, all the numbers produced will be numbers that add up to 10, like 6 and 4 or 3 and 7, guaranteeing sums of 10.

Trophy
In the Wii U version, Dr. Kawashima's trophy is a Challenge reward, unlocked by clearing without losing any lives.

As an Assist Trophy
Dr. Kawashima reprises his Assist Trophy role from previous games. He seems to function the same as in Smash 4. One notable change is that his appearance changes the background of the stage to a white graphed background. He cannot appear in Boxing Ring, Coliseum, Frigate Orpheon, Green Greens, Hollow Bastion, King of Fighters Stadium, Kongo Falls, Midgar, Moray Towers, New Pork City, Princess Peach's Castle, Prism Tower, Tortimer Island, Town and City, and WarioWare, Inc.

Trivia

 * In the Dr. Kawashima Spirit Battle, after a few seconds of his Assist Trophy effects, the background produced by the Assist Trophy will disappear, as though the effect was ending, however the numbers will continue flying indefinitely.

Dr. Kawashima