Personally, i'd really like to see a sequel to The Magic of Confidence.

A Nidoking and Machoke (or two sports teams, one composed of Nidokings, the other of Machokes) work out /spar together, when, unknown to them, someone has spiked their water bottles with an enhancer/aphrodisiac.
Things quickly go out of hand.

A plant pokemon absorbs too much sun.
A water pokemon finds a ~magical, pure spring~
A new kind of hyper potion is tested in a lab, and the predictabel joke occurs.
A pokemon falls into a crack and lands in a huge, natural geode lines with evolution stones.

Well have you thought about trying out more characters from cartoons, animes, or video games?

If you want some ideas on that I would be happy to share. =3

meme based story
hyper story where a character of choice gets shot in the knee with an arrow and growth happens.

I actually really liked this idea.

Then I took an arrow to the knee.

You're on the bandwagon now, and you can NEVER leave, ahahahahahaha!

Personally, I've always wanted to see a hyper story with permanent consequences, big consequences, but nothing too drastic. Perhaps something like a guy ends up gradually growing over the course of a day until he reaches somewhere around the size of a small bed, and having to live with that for the rest of his life. Don't know if you'd like doing it or not, but I'm sure it'd be fun to write him going about the day and trying to deal with his daily tasks with a cock like that. X3 Especially if he had to go about his tasks in public.

Whoops, just saw this.

Well, how do you feel about writing about females? They could be the focus of growth, or just a witness (or instigator).

Once I know the answer to that, I'll share some ideas.

Thanks to the answers you gave me in that note, I have an idea to share.

How about a guy who is visited by his future self? The past self wants to grow, but only his future self has the resources. I recommend using a stable time loop for this.

This idea is not originally mine, but is altered from something I saw in daigashi's gallery (not sure if I got the name right).

I'll try to think of something else using what I learned about your interests.

Maybe you could create a story involving tail play, for example, 2 furries get it on by humping each others tails.