The Monster Center is a building which is utilized to heal Monsters, put Monsters into storage, and take Monsters from the storage and into the Monster Trainer's team. It is usually found in every major city throughout the zones, and it is signified by its orange roof and usually a large sign saying: "Monster Center". To access the Monster Center, simply move your character into the door.
When using AI02 Fly on any map with a Monster Center you will be transported to a few steps south from the Monster Center door. This does not occur when flying to Palladium town, Bamboo Coast, Volcanic Coast, or Condor Town
After buying or trading a Monster from the Bazaar, check your storage to add them in your party.