Source: https://www.furaffinity.net/view/10094140/
Seams like some one need to go potty and that relay bad. But like you see Eevee is not going to use any potty like you can see. He is going to be force to use his diaper like a good Pokemon. He can not hold the pee back for ever. so i think it is best for him if he you st let it go and wet his diaper.
Source: https://www.furaffinity.net/view/10094165/
This two drawings is created by: RuugiaRuu on Fur Affinity
Like we can see Eevee could not hold it back any more and he use his diaper. But it seams like even the diaper dont could handle this big flood he made so the diaper started to leak allot.
I hope some one can come and help him whit this big leak and that wet diaper so he dont get any rash or other skin problems for this wet diaper.