The latest randomizers allow "Randomize Trainers by Same Type Count." For example, Bug Catcher Bob might have three random Bug types... or three random Dragons.
First, a critical distinction: is not a single ROM. It is a dynamic patching tool or a specialized emulator build (depending on your platform) that applies two layers of modification to legitimate DS ROMs (US or EU versions). pokemon+randomlocke+ds+upd
The community standard. The (v1.7.2 to v1.8.0 beta) include: The latest randomizers allow "Randomize Trainers by Same
Wild Pokémon encounters (e.g., finding a Kyogre on Route 1). randomizing it often yields highly stable
Platinum has an excellent native engine; randomizing it often yields highly stable, beautifully scaled trainer teams.