93 - Evolve from Bonsley or if you have Pearl Sudowoodo is on Route 214 and 221.
138 - Mt. Coronet (Super Rod) in Plat Foggy Room(Old,Good, and Super Rod)
146/147/148 - The Pixies are all located in their respective caves, Mesprit roams, but reveals itself to you so you get the dex entry anyways.
152 - I think you mean 151 since you don't need Darkrai to complete the Sinnoh Dex. I believe you can see a image of Manaphy at the Mansion off Route 212.
I would tell you where the trainers were for the non legendaries but, I couldn't tell you were atm.