>>58140071Vicegrip is a good early game filler move on some specific Pokemon. It's not something that you're supposed to keep on a Pokemon, but be kind of happy because their starting move is slightly stronger than Scratch, Pound etc.
>>58140146In gen VI they got pretty substantial buff to 80 BP. It's especially relevant in ORAS, as it finally gave Treecko a good early-game STAB.
>>58140163Using Memento in Nuzlockes is obviously suboptimal. You'll see Clamp a lot if you decide to bring Deepsea Scale Clamperl to Hoenn (gen 3) Elite 4 - surprisingly, a lot of Pokemon there has a hard time breaking through Clampearl.
>>58140223I think I used it once or twice in Crystal because Return on Noctowl was hardest I could hit Morty's mons.
Kinesis, especially that for a while it was a victim of Gamefreak's small oversight. Abra evolves into Kadabra at level 16, but Kadabra learns Kinesis at level 15. Unless you fucked around with Stadium's move relearner or glitching the game into spitting out a wild Kadabra, there was no way to use that move on your Pokemon in Gen I at all.