im not sure what type of clowns you got but i'm gonna assume occellaris?, in which case adding a maroon is probably a real bad idea because more than likely it'd bully the others relentlessly. also i've never ever heard of a bumble bee clown? by any chance do you have a latin name for it?
also give them some time to adapt, i'm sure they'll come around to pellets soon enough but maybe use some frozen plankton to get them eating.
as for the lion it may be use to feeders so you may have to use them for a bit before being able to ween it onto other foods, but lions can be converted to frozen, freeze dried, and even pellet foods. although my experience is with other species, the fu man chu may be more difficult as i've heard they are harder to maintain. also keep in mind that pending your clowns size now they could potentially be a meal, lions in general have very large mouths.
best of luck on the new addtitions.