Well Pokemon is an easy grind. Facing any low levels is not difficult. Combine that with the fact it was running 24/7, it's not that surprising to me.
LoL would be significantly more difficult because it's not a game limited by a whole 10 controls (arrow buttons, start/pause, L/R, and a/b) like GBA games, and would require somehow averaging coordinates since controlling characters is primarily done through clicking a space on the screen, not to mention selection of enemies, items, and abilities.
The thing is, any real-time game would be a difficult undertaking to crowd-control, but turn-based grid-movement games are not that difficult, and are simple to trial-and-error your way through without requiring to-the-second reflexes like most all MOBAs.