Honestly, Cadence and Shining Armor are always a treat to see with crinkly scenarios!
To go with them, Chrysalis is pretty fun too!

Could we see Vinyl Scratch it Octavia or how about Sugar Bell

princess luna pooping her pamps while asleep with a paci in her mouth, or spitfire flying with a huge pamp on thats styled after the wonderbolts flight suits.

Starlight Glimmer

I'll always want more Pinkie Pie, but outside of her...

Rainbow dash in wonderbolts outfit + diaper is always good~~

Soarin or Doughnut Joe

Uuuuuuuh

Buttons Mash???

Idunno

Not an MLP fan but I’ll suggest Daring Do

Twilight and apple jack

Never see enough poofy Rainbow Dash so I'm all for that.

I'd say the Changlings, cus they are different and could be neat to see. Plus they feed on 'love'

One pony I have seen little to no diaper art for, is Twist. She's such a cutie and deserves to be pampered a lot.


Ref: https://mlp.fandom.com/wiki/Twist

Other than that, my main Filly Babs Seed. She also has little to no diaper art. But I want to change that.

Trixie is always a fun one! To me at least

the mane six as the power ponies in really big and thick poofy diapers that are hyper messy, they look embarrass and blushing as they are defeated or the same thing happens to Mane-iac and high heel

https://mlp.fandom.com/wiki/Power_Ponies_(characters)
https://mlp.fandom.com/wiki/Mane-iac
https://animatedmusclewomen.mirahez.....wiki/High_Heel
https://comicvine.gamespot.com/high.....l/4005-108050/

if you want you can my oc Paddeia as the one that defeated them.
https://www.furaffinity.net/view/19349692/
https://www.deviantart.com/megablue.....-iac-601341011
https://www.deviantart.com/megablue.....dl94-674968684

I would suggest some of the Gen 5 crew myself. Sunny, Izzy, Pipp, Zipp and Hitch. They are quite a lot of fun together.

https://www.deviantart.com/tuttyfru.....nArt-889802049

MLP Adjacent but I would also suggest the Student 6 as well

https://static.wikia.nocookie.net/p.....ix=protagonist

For a specific scenario, with summer approaching trips to the beach should be fun, hopefully someone remembers there swim diapers and not go into the ocean with regular diapers. That sure would be embarassing right? (Wink Wink) Pool Toys to relax on could be fun too. Espicially Pool Toys based on ponies since those are canon.

https://static.manebooru.art/img/20.....8130/large.png

Moondancer! Reading like the cute nerd she is

Anything with Trixie and Twi is usually a fun scenario.

Braeburn or Sunset Shimmer!!!

Is it only ponies or can we suggest any character from mlp regardless of species?

How about something with Nightmare Moon and Daybreaker? ^^

yours :)

Starlight in a pamper with that “is equal to” symbol on its backside. No one gets continence in Our Town! : P

Minuette and Silverstream! I know the latter isn't a pony, but dang it, they're both too cute not to pad up together!

um uh rarity

Anything spike! But probably spike, the "canon baby drag" being forced into padding and being a flustered mess, seemingly the only one of the main six being resistant. Bonus if Angel or other pets are there, just to be smug, or otherwise as proof that "see spike, Opal/Tank/Etc aren't being a brat."

SPIKE!

Chrysalis!

https://www.youtube.com/watch?v=gWvY4pm6om4
These ones.

Derpy is really my favorite, so you pretty much got my preferences covered :P

Maybe a cute sleepover pony party with adorable diapers.

scootaloo!!

Rarity asking her friends (or the princesses) to model diapers for her, and being appalled when one of them actually uses one of them. Then getting super huffy because she has to change them immediately, and not because she 'wants to' obviously it's just cause she's the best at changing diapers.

(bonus points if it's Rarity/Pinkie Pie)

Gotta say the waifu Princess Luna

Fluttershy!

Autumn Blaze! have her use pamps to (hyper) "destress" when she's in situations where she's frustrated to avoid going Nirik

Trixie magicing a diaper on her accidentally. Cuz we all know it’s gonna happen at some point

How about rarity have a fully loaded diaper as it was very Heavy to move in as she have Spike Carry her as we see spike is having a hard time doing so ❤️

How about Lightning Dust and Daring Do.

Or perhaps a music farting organ with both DJ Pon 3 and Octavia Melody.