I have been on this website for quite a few years now, however I have never bothered to level up my pets. I have recently started training them in the gym, but I don't know how to up their other stats such as Intelligence. Is there a how-to guide?

Thanks!

The Official Battle Guide v3.3 is a great place to start for battling related stats, it has a whole section dedicated to stats. The training center is probably the main place to up stats, but there are stat boosting items, and exp. earned from the battle coliseum and battle quests. In regards to intelligence, that is upped by reading books to your pet, playing magic spindles, and a couple other stat boosters. Stats in general can be boosted by random events around the site, and the job agency

Thank you for all that information Nayo!

if your pet has a job it has a change to increase INT also.