Continuing to work our way down the list, the second stage is High Tome Forest. If you go here second, you'll have to square off against the twins, Kim and Che, though there is an alternate boss that sometimes does appear here instead. Anyway, this dastardly duo is much tougher than the Ogre was. Each one has both a sword-based attack and a magic-based one. If you were fighting one-on-one, these attacks wouldn't be too hard to dodge, but as is you can often find yourself engaged with one twin while the other hits you unexpectedly.
Each twin can be stunned with a single ground-pound, and ideally the trick is to stun both of them at the same time, though this is easier said than done. Once stunned, you can work on them using primarily air slash attacks. Each time you stun one, they'll come at you with a jumping attack that you'll need to dash underneath--be wary of the other twin while you're doing so, though, lest you be the victim of a surprise attack. It took me many, many attempts to try and get past these two, so be prepared to lose a considerable amount of your 1000 Prinnies on this stage.