Oh, those took me a long time! For Dashboy, it is just a matter of doing some tight jumps. A tip I could've used is while jumping on the 2-enemies, you can actually ctrl to the left ledge, making it a lot more trivial. Greedyboy is a bit more difficult. Collecting the coins in the shallower water is crucial at the end.
BTW SORRY LATE POST
Nevermind nothing to see here :D