Long time no see, Kuro.
You got the wrong idea about TPDP when you read my post, didn't you? Well, it's nowhere near as bad as I made it sound like; the others are actually more accurate, now that I'm playing it again, and recovering from that bad slump last week.
Sure you can grind to 100 like Pokemon, but it's gonna take a very, very long time, because wilds are fairly stingy with XP. Between that and the much higer XP yields from trainer battles, the game discourages hardcore grinding as you were thinking of doing.