Brawlhalla” is having an “Adventure Time” crossover event, Ubisoft announced on Monday during the publisher’s E3 press conference.

“Finn, Jake, and Princess Bubblegum are new Epic Crossovers! Epic Crossovers feature custom signature effects, custom lock-in animations, dedicated roster spots, and two new weapon skins,” the “Brawlhalla” blog explains in a list of patch notes. “In Brawlhalla, Finn, Jake, and Princess Bubblegum mirror the abilities of Jhala, Kor, and Lord Vraxx, respectively, and will be staying in Mallhalla after the event ends.”

In addition to the three “Adventure Time” character skins, the event — which began Monday, June 10 — also introduced a new Buddy game mode, a new map, and more.

The annual Electronic Entertainment Expo, better known as E3, takes place at the Los Angeles Convention Center from June 11 to 13. As is tradition, however, things kicked off early on Saturday at 12 p.m. ET with Electronic Arts’ EA Play event, which was held at the Hollywood Palladium on June 8 and 9.

Microsoft had its big Xbox E3 2019 Briefing on Sunday, June 9, at 4 p.m. ET. Publishers Bethesda and Devolver Digital also hosted press conferences that same evening at 8:30 and 10 p.m. ET, respectively.

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E3 2019 is coming to Los Angeles on June 11 through 13, and we’ll cover all the highlights of the event here at Variety as well.