Pokémon Battle Revolution

Pokémon Battle Revolution is a 3D battle simulation game that becomes nigh-impossible (if not outright impossible) to complete without actually having to buy one of the main-series fourth-generation games.

Unused narrations
There are two unused narrations for Lagoon Colosseum; "ba120_0" and "la030_0", respectively. If ba120_0 is played, the announcer says "Lagoon Colosseum, Tournament Battle. First match". If la030_0 is played, the announcer says "Surrounded by cascading water, the battle is about to begin."

These may imply that Lagoon Colosseum was once intended to have been its own tournament in single-player battles, rather than a multiplayer-exclusive Colosseum. ZIYk9sr2ipw

Unused Song
May have been intended for the supposed Casino Colosseum, or possibly just for menu music. x9b-PDpAL-Y

DS Transfer Disable
If this game is hacked in any way (whether it be codes or not), it will be impossible to transfer Pokémon from a Nintendo DS game card to the Wii. The only way to be able to transfer again is to delete the save file manually from the Wii menu.