IT WAS A TRAINING GAME, WHERE YOU PUT YOUR PET/MONSTER TO TRAIN SPEED, STRENGTH, MAXIMUM LIFE/HEALTH, DEFENSE, ALL OF THIS WAS TRAINED ON A TREE WITH SEVERAL BRANCHES, YOU COULD SEE THE MONSTERS TRAINING AND THEN YOU COULD PUT THEM TO BATTLE AGAINST MONSTERS, I THINK IT WAS 3 MONSTERS/PETS THAT WE STARTED WITH, I THINK IT HAD MONSTER OR DEFENSE/DEFEND IN THE NAME
Could it be Monster Sanctuary?
it is not
can you remember what the graphics style was like? 2D or 3D. like the screen view type etc
era 2d