First Battle

First Battle is, as its name implies, the first map in the Coliseum.

Fight
This fight is against the so-called Invincible Hero Squad.

It is worth noting that the best - and possibly only - way to get the sword Supremacy, the Almighty Armor and the Maxi Sandals is by stealing them from the leading enemy in this stage, although their stats are extremely poor, so the only reasons you would really want to are for complete item collection in Dark Hero Days or for the Collector specialists they contain. There are no Geo Symbols or Geo Panels in this place.