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Sonic Rumble Pre-Release Event: Monkey Ball, Altered Beast Crossover

Author:Kristen Update:May 25,2025

While the global launch of Sonic Rumble is still a few weeks away, set for May 8th, the excitement is already building with a pre-release crossover event that's set to dazzle fans. This isn't your average crossover; it's a celebration of Sega's legendary characters from past and present, all joining the fray in Sonic Rumble.

This unique event kicks off before the game's worldwide release and will be available to players in regions where Sonic Rumble is currently in soft launch. From now until May 7th, you have the chance to claim the Werewolf character, inspired by the iconic game Altered Beast, absolutely free.

For those with the Sega Star Event Pass, there's even more to look forward to. You'll unlock the Weredragon from Altered Beast, and get to play as Opa-Opa, the beloved first mascot from the classic arcade game Fantasy Zone.

Sonic Rumble Pre-Release Crossover Event

But the excitement doesn't stop there. Additional characters will be up for grabs in the in-game Ring Shop, including Upa-Upa and the Werebear. Meanwhile, the Red Star Ring Shop will feature characters from Super Monkey Ball—AiAi and MeeMee, adding even more variety to your roster.

It's certainly unusual to see such an event before a game's official release, but for those fortunate enough to participate in the soft launch, it's an incredible opportunity to get a head start on collecting these iconic characters. And this is just the beginning; Sega has promised a busy schedule of crossovers and collaborations for Sonic Rumble, ensuring a continuous stream of exciting content for players.

On a side note, keep an eye out for upcoming releases. Finnish developer Supercell is gearing up for another rare launch. Dive into our Mo.co preview to learn more about this quirky, monster-hunting part-timer simulator, coming soon to iOS and Android!