Hmm... Well, where Guilmon's from, you get to Mega level by biomerging with your partner! Everything worked really different there, though. We reached Ultimate with blue cards instead of crests. Maybe there's some other way to do it here, but Guilmon isn't sure. I wish I could help more...

[He slumps, giving a soft sigh. It's a little bit beyond him. After a few seconds, though, he perks back up, raising a claw.]

But I bet a big team of Digimon might do the trick! You'd just need a really, really big group.

[Then again, Beelzemon was a Mega, and the combined efforts of two Ultimates didn't do the trick. It's a tough call...]