>>40157378I've only played the first 2 gens of PMD but had an amazing time with them. I'd say start with Red/Blue Rescue Team if you want to appreciate Explorers of Time/Darkness/Sky some more, amongst other things. Differences between them are Red = GBA, Blue = DS and some version exclusive mons like Plusle (Red only) and Minun (Blue only). Explorers of Time & Darkness had more drastic version exclusives in comparison (plot relevant Pokemon) so if you're not sure which one to pick, check the exclusives. Unfortunately I don't remember how much T&D differ from Sky so dunno if you could just skip them entirely.
Obviously can't say much about Gates to Infinity but I remember it to be kind of a drag gameplay-wise from what I saw online. So maybe look at some game footage first to decide if it's worth your time at all, wouldn't recommend it as your first PMD experience though.
To anons who played Super Mystery Dungeon: How was the gameplay? Did you have fun? 