Maybe they know how to close that portal...or send those things back.

[He'll pull out a pokeball and releases a Lampent.]

Wisp can help with that. Wisp, keep Gus there as safe as you can. We're under attack and these things are dangerou-

[Wisp waves a part that looks like an arm and Dipper apparently already knows what they're trying to ask.]

-no I don't think you can steal their life energy. ....actually try that anyway we might as well.