How do I get the Affection Ribbon for Sylveon in Pokémon Brick Bronze Forever?

Hi! I'm trying to evolve my Eevee into Sylveon in Pokémon Brick Bronze Forever.

A friend told me a while ago that I need the Affection Ribbon, and I looked it up first, but most guides I found seemed outdated, so I'm not sure what still works anymore. Some guides mentioned battling AI trainers in the Battle Colosseum to earn BP.

I checked the Colosseum and only found the BP shop, move reminder/deleter, Hyper Training, and the Bottle Cap NPC. I couldn't find any AI trainers, so I'm not sure if that method was removed or if I'm just looking in the wrong place.

Is there currently a free way to get the Affection Ribbon (or BP) without buying it with Robux, or is PvP the only option now? Thanks in advance!