>>45555593>overlevels,He almost universally sets level caps to the highest pokemon of the next gym leader, with variable consequences if it is breached. Sometimes it's just boxed until the limit lifts, sometimes it "dies" from that, and other times it'll wipe the run.
>only plays mainline gamesHe does the mainline games as they come out, but otherwise does challenge/kaizo hacks almost exclusively.
>and has used modified rules beforeTechnically true, he often bans specific pokemon, with two tiers being "banned if guaranteed" or else just banned outright. Blissey, for example, is an example of the latter, while Garchomp is an example of the former (ie. The Wayward Cave Gible is usually banned, as it's easy to make that the only encounter you'll get, but the Victory Road Gabite usually isn't, because it's much harder to guarantee that encounter.)
The only other modifications are Shiny clause and if there is a selection of gifts, he allows himself to choose instead of rolling for them.