Jack Bommers have the same model type as Egg Pawns. Unlike Egg Pawns, they constantly balance on a large ball, and juggle flaming orange balls.
Shadow the Hedgehog
Jack Bommers first appeared as enemies in Shadow the Hedgehog. They are only encountered in Cryptic Castle. In gameplay, they will throw their flaming balls at Shadow and try to ram him when he gets close enough. They also lose their juggling balls when their balance ball is attacked.
When a Jack Bommer is destroyed, the ball it balances on will create a massive explosion that will hurt the player. In order to neutralize this explosion, the player needs to attack the Jack Bommers' balance balls with a long-range weapon until they disappear. Once the ball is gone, the player can safely eliminate the Jack Bommer close up.
Sonic Rivals 2
In Sonic Rivals 2, the Jack Bommer appears as one of the game's collectible cards. To collect it, the player has to complete the Silver Cup in single player or unlock Silver the Hedgehog's Christmas Suit.