Quoted By:
Gave myself an hour, I was able to get all of Kanto but I was missing at least one from the other regions. I did it in chaos cause regular made it too obvious what I was missing, especially in the later generations where the Pokemon's dex order pretty much lines up with when you run into them in a regular playthrough.
I rely on grouping similar Pokemon together (the obvious stuff like Starters, Regional Bugs, Birds, Rodents, Fossils but also some other stuff like the Odd Generation Fungi and the Old Generation Water/Flying Pokemon) or recalling boss battles with those Pokemon. Out of the ones I did miss (Shuckle onwards) I'd say the only ones I really shouldn't have forgotten were;
- Bruxish (used one in a Ultra Sun playthrough that did surprisingly well)
- Dubwool (Hop's battles)
- Garganacl & Scovillain (Arven's battle)
- Cyclizar (relation to Koraidon/Miraidon)
I know Falinks now has a boss battle associated with it in Ivor but I wasn't really thinking of ZA at all and for the rest I can't really think of a boss battle that uses them (if it's stuff like PWT or post-game teams I probably won't know and I haven't really gotten to remember Kieran's team aside from Hydrapple and the Blueberry Academy Elite Four's teams).