What is a quick way to level your pets really fast up to over 60? Just like 65?

Your grind the lost grove

there is realy nothing to train quickly at that level realy, there is a difficulty spike in the Lost grove tho so it's not alwais the best option to use but it is the most avalable one. During festivals, the ennemy from the zone will scale with your highest pet, those ennemies are usualy alot weaker strengh whise then those from the LG witch can very slightly quicken the training process, keep an eye out for days of boosted exp and sutch. ^-^

Quick way? Use a bunch of experience orbs.

But I assume that's not what you're looking for since that method can get real expensive real fast. There is a massive spike in the amount of experience you need to gain levels once you reach level 60. It takes significantly longer to get from 60 to 61 than it did from 59 to 60. So no matter what "free" method you use it won't be quick.

The best area to train in is the Lost Grove. The Lost Grove introduces Move Ranks. In short, you can level up your individual attacks to make them stronger. You do this simply by using the moves a whooooole lot within the Lost Grove. You can't level up your moves anywhere else so it's typically best to level up your pet and your moves at the same time. Move ranks will make your pet much stronger than any single level will so they are definitely worth having. Good luck beating any of the highest tier bosses without them.

Thank you guys!