Firey

Firey is the proagtonist and winner of BFDI. He appears in EBCGD as a hero. He doesn't appear very much.

FreeSmart
He rained from the sky and Match caught him. Then, along the other FreeSmarters, went into the FreeSmart Supervan, which turned into a rocket  ship. After 3 years, they arrived on Neptune. They saved Pencil and Bubble. They put Dr. Eggman in jail, and exploded.

Match vs. Polandball
Firey gave Match a scanner ("offscreen"). He appeared on the second slide. He melted Polandball as a stone, but was extinguished to to the Polandball Liquid (another name for liquid clay). He might have also given Bubble a scanner, offscreen.