>>30941573I finished Flawless Platinum the other day.
Really, really enjoyed it, it was probably the most fun I've had playing a pokemon game. The slowness of Sinnoh didn't bother me too much since I was watching movies and other series while playing.
The only annoying things were a glitch where the cycling road could only be accessed from the south, and Cynthia's team being replaced with just legendaries.
Every pokemon (except shedinja) now has at least 500BST, and a few typings and a lot of learnsets have been changed. There's a challenge mode and a normal mode, challenge mode was good fun and my team was in the 90s by the end of the game. You do not need to grind random encounters in challenge mode, the increased levels of all trainers gives you enough exp.
Highly recommend it to anyone wanting to replay Platinum, but with a greater difficulty level.
I would say though, if playing challenge mode you'll need a fairly balanced team with at least 1 steel type, dragon tamers are hell at victory road. I 'fixed' my teams EVs after each gym battle and also modified their learnsets slightly (replacing focus blast with aura sphere, for example) so that made things a little easier. 
