Kuro is a character from the Japanese exclusive video game series known as Doki Demo Issyo, however he has made a few appearances in the west to help his friend Toro Inoue.
Kuro became friends with Toro Inoue in the game series he originated from, it is unknown how or why in the west.
Kuro could be seen in Ape Escapellion Monkeys, where he could be found.
Street Fighter X Tekken
Kuro was one of the PS3 excusive fighters in the crossover game Street Fighter X Tekken, where he would fight against Various Capcom, Tekken and Sony mascots.
Kuro has appeared in PlayStation All-Stars Battle Royale, where he would help Toro in his fighters against various warriors. He is also a DLC Minion.