Karate Joe

Karate Joe is the very first character to appear in the Rhythm Heaven series. Not only that, but he is the most recurring character in the Rhythm Heaven franchise, having appeared in all four games in the series.

Appearance
Karate Joe is characterized by his pale white skin, big nose and balding head. He wears a black belt karate suit that matches the color of his skin. He wears no shoes. He is portrayed as attractive in Rhythm Heaven  when a Dazzler is seen watching him work out at the end of Karate Man 2 when achieving a Superb ending.

Rhythm Tengoku
Karate Joe first appeared in Rhythm Tengoku as its first rhythm game, Karate Man. He very soon later appears in the first remix alongside the four other games in Set 1 other games. Much later, he reappears along with every other game in Remix 6. He would then appear in Karate Man 2 right after that. He then made appearances in the last two remixes, Remix 7 and Remix 8.

Rhythm Heaven
Karate Joe appears in many games in Rhythm Heaven. He first appears in Karate Man, notably being the last non sequel/remix game in the game. Right after that, he reappears in set 6's remix, Remix 6. Many games later, he appears in Karate Man 2, Karate Man's sequel. He also has parts in the last three remixes, Remix 8, Remix 9, and Remix 10.

Rhythm Heaven Fever
In Rhythm Heaven Fever, the karate fighter appears in many different games as cameo, however they are usually Easter-eggs. He first appears, as with the other games in the Rhythm Heaven series, in Karate Man. This rhythm game takes place right before the seventh remix, him appearing again. He gets parts in Remix 9, and gets a sequel minigame in Karate Man 2, right before the final remix, him appearing in that as well. This proves that he is the most recurring character in the Rhythm Heaven series.

Rhythm Heaven Megamix
Karate Joe appears in Karate Man, Karate Man Returns!, Karate Man Kicks! and Karate Man Combos!, all of which as a playable character.

Trivia

 * Karate Man appears in cameo in Remix 7 of Rhythm Heaven Fever. After the last time you use him in that remix, you see him in between games (right before you start Tap Troupe at one point). You see him sitting on his side on the floor in a nearly empty room watching a small TV, scratching his butt.
 * The TV he is watching displays an image of Karate Man (GBA), a game featuring Karate Joe.
 * Karate Man has appeared as a playable character in 15 different games through the series.
 * Karate Man makes a cameo in the "Rhythm Heaven" game Blue Birds 2. He can be in one of the clouds above the birds, standing as the birds look at him from a bush.