Curate, connect, and discover
I think it would be interesting, but i dont think i would be good at making the mashup myself, since im not good with keeping characters in-character. So i will just give some random bullet points. There is probably more stuff i cant think of
*Numbuhs 1, 3, and 5 may count as psychic. Since Numbuh 3 can understand animals (Zoolingualism), Numbuh 5 has some sort of psychic link to ice cream, and can sense when tons of it has been destroyed (there isnt a power exactly like this, so this could be a new power which lets you detect things you are passionate about?), and Numbuh 1 could potentially have inherited Fathers powers, which would also count as psychic.
*Speaking of Fathers powers, how would the shadow suit work with the Psychonauts universe? Pyrokinesis, levitation, and telekinesis already exist, and self-replicating could be labeled as illusion power(?), but what about shape-shifting and the shadow suit? I dont think they can count as illusions because the shadow suit can be torn off, so it could be some sort of projection?
*Numbuh 4 and Oleander somehow ending up working together would be pure chaos. I can feel it.
*Milla dislikes the villains for being evil to children, but she hates Father the most. Like, absolutely DESPISES him. How could she not, really? Hes basically the archetype of an abusive parent, brainwashed a group of children, abuses said children, and he fights kids with fire of all things!
*I think the most fitting way for them to meet each other is if Sector V tried invading Whispering Rock.