>>44437545Nidorino doesn't get anything useful from its lvl up pool (most gen 1 mons don't) so as soon as you get a moonstone just go for it
pikachu on the other hand continues to learn useful moves
https://bulbapedia.bulbagarden.net/wiki/Pikachu_(Pok%C3%A9mon)/Generation_I_learnset#By_leveling_upin rbg it learns thunder at 43 as the last move which is useful if you want to save the thunderbolt tm
in yellow it learns thunderbolt at lvl 26 so unless you want lightscreen you're good after that
