Nidoking, klinklang, victeebel, ninjask, shedinja, aggron, cradily, armaldo, torterra, electivire, cofagrigus, carracosta, archeops, reuniclus, sawsbuck, hydreigon, chesnaught, gangoro, tyrantrum, aurorus, Noivern, zygarde, lycanroc, wishiwashi, kommo-o, solgaleo, lunala, xurktree, kartana, necrozma, stakataka, melmatal, flapple, appletun, runerigus, glastrier, spectrier, garganacl, and annihilape would all be great addition to the game. Some could bring in a cool feature.

all of these:

or just Jirachi. btw this is the website I used to make this: the ultimate favorite pokemon picker

Here's my version of the graph. Some of the ones in 1st place spots were really hard to pick between so if I were having trouble, I would choose the one that I would like to play with.