mega pokemon in general .
some pokemon on top of my head ( i have these pokemon in my PC)
machop, tentacool , geoduce, magnemite , maybe drowzee , cubone, Exeggcute for sun team , hitmonchan, choice scarf/band hitmonlee, rhydon, tangela for sun team, horsea, staryu, pinsir , lapras, magikarp, some eevee line (water,electric, fire, dark) , porygon, omantyte, kabuto, snorlax
edit1: hoothoot, Spinarak, Chinchou, Togepi, Mareep, Marill, Aipom, Sunkern, Yanma. Wobbuffet, Pineco, Dunsparce, Heracross (guts), Teddiursa, life orb Sneasel, Delibird, Phanpy, Larvitar
edit : crossed out the pokemon .com mentioned .