Bomberman

Bomberman (sometimes specified as White Bomberman) is the titular main protagonist of the  series of video games. His first game appearance within any Mario-related media is in the Wario crossover game Wario Blast: Featuring Bomberman!. He also appears alongside Mario and others in three comics published in the German Club Nintendo magazine, as well as in Super Smash Bros. Ultimate.

Wario Blast: Featuring Bomberman!
In Wario Blast: Featuring Bomberman!, Wario finds the secret gateway into Bomberland and attempts to plunder its riches and conquer the Madbombers. In the game's campaign, if players choose to play as Bomberman, he fights against Madbombers that look like Wario. If Wario is selected, he fights against Madbombers that look like Bomberman.

"Warios Weihnachtsmärchen"
Bomberman also appeared as a main character in the comic "Warios Weihnachtsmärchen" (a story based on Charles Dickens's A Christmas Carol), published in the German Club Nintendo magazine. In this story, he worked as a sales-clerk in Wario's Bombenladen, a shop selling bombs. When he asked his cold-hearted boss for getting days off during Christmas, Wario fired him, resulting in Bomberman not having enough money to buy Christmas presents for his friends. The Ghosts of Christmas, however, made Wario aware of his bad behavior, so in the end of the story he hired Bomberman again. He serves the same role as Bob Cratchit from the book this story is based around.

"Sag niemals Holerö!"
Once again, Bomberman played a major role in the comic, "Sag niemals Holerö!". This story is about an evil alien called Heini who is able and plans to turn the humans on Earth into food by singing the magical song, "Holerö". Mario and TicToc, not knowing about the spell yet but noticing its consequences, were among the few who could resist it, and on their way from Switzerland to New York, they met Bomberman in Austria who was not affected by the spell either. Bomberman introduced himself as "Bombi from Vienna", and decided to join Mario and TicToc in order to solve the mystery jointly. The three of them soon met a Toad called Todojewski who told them about Heini and his plans. He also gave the advice to go to "Taj Mahal", a restaurant in Frankfurt, Germany, so Bomberman and his friends went there. In Taj Mahal, they met a man called Mahgo who told each of the heroes about one special power they had. Bomberman's power was throwing bombs.

Later in the story, the three friends stumbled upon three girls called Nicole, Pia, and Balu, who had not been transformed either. Glad about this meeting, the six of them had dinner together. Balu decided to turn on some music, and Pia made a remark that she should play their "favorite song". In this moment, Bomberman, seeing through the girls' true plans - playing the "Holerö" song and thus turning Bomberman, T.T., and Mario into food -, threw a bomb at them and saved his friends. He made use of his power once again when the three heroes got wise to Heini in the kitchen of the Alte Oper. The alien was just about to serve the transformed humans to his fellows, when TicToc stopped time, and meanwhile Bomberman threw bombs at the aliens. Mario rescued the people, so the friends could save the world from evil Heini.

"Freeze Frame"
Bomberman also appears in the N-Gang comic called "Freeze Frame", where Big B, Yoshi, and Diddy Kong find him and Kirby frozen in the solid block of ice.

Super Smash Bros. Ultimate
After approximately 19 years of not appearing in Mario-related media, Bomberman appears in Super Smash Bros. Ultimate as an Assist Trophy. When summoned, he places bombs that explode and deal damage. Bomberman also appears as a primary, ace, grab-type spirit. The Bomberman spirit battle is against Toon Link on the Battlefield version of the Wrecking Crew stage, with the opponent having increased power on explosive and fire attacks, and hostile Bomberman Assist Trophies appearing. The music played in the battle is "Bomb Man Stage", originally from the game .

Bomberman is one of the first Assist Trophies from third-party series without any playable fighters from their home series, with the others being Akira, Rathalos and Shovel Knight.