The AU Warphole is the place in Underfighters 2 that allows you to transport to any AU.
These include...
- Undertale Warp: LV 1
- Underfell Warp: LV 20
- Underswap Warp: Reset 1 LV 30
- X-Tale Warp: Reset 5 LV 50
- Outertale Warp: LV 50
- Custom Item: Gamepass
- The Five Underfighters: LV 90
- Soul Forge: Reset 20
- Ancient Hall: Reset 30