Hi.
I found this idea on Sppf, so I thought I'd give it a try here.

Basically,

Aroma Lady in route 111:

On Six Island, after you Surf up from the right side of the island and get on the next island, there is a house in which there is a woman who likes Heracross disturbingly much. Her dialogue, exact quote: "Hera, hera, HERACROSS! Big and shiny, it's the bug boss! Love it, need it, HERACROSS!" And, guess what, she wants to see big ones. With big horns that are *cough* not phallic in any way.

When you actually bring her a Heracross... exact quote: "Eeeeek! That's a HERACROSS! Please, please, may I measure how big it is?" And then she measures it: "Eeeek, it's 61.6 inches! I've never seen anything like this! You deserve a reward!" Then she will give you your reward (I got a Nest Ball; I'm not sure if that's what you always get) and then, just to make things even more disturbing, she says, "I want to see a much, much bigger HERACROSS than that one. Oh, how I adore them, big HERACROSS!"

Enough said

o.o
Mummy..? I'm scared.

Not surprised XD

Anyways:

In the Team Galactic headquarters in Veilstone, there is a room in which there are two beds and a sign on the wall between them that says, hilariously, "Team Galactic Nap Room: Ensure the bed is unoccupied before getting into it!" Okay, so that's the dirty interpretation, but really, if they've been having problems with people getting into beds that somebody else is already in, Team Galactic is either even more profoundly stupid than we thought, or getting into bed with another person was intentional. As dubious as it can be to underestimate the stupidity of any Team, I feel more inclined to assume the latter.

What about the mention of Pokémon feces when you buy mulch on Route 208? "It's made from high-grade Pokémon...you know."

James comes out of the closet. =p

There's a Maid in the Battle Castle pining for Darach.

Egg- "we don't know HOW it got there but your pokemon HAD it so its yours"

Ewwwwwww thats nasty.

I'm beginning to think James is.........not child friendly. 

In RBY you go on the SS Anne and you have to go to the Captain and rub his belly.
In GSC there was the girl that wanted to play with the captain.
Speaking of which why does every boat in a pokemon game have someone with seasickness?

A Picnicker in Rock Tunnel tells you, "Ew! Don't try anything funny in the dark!" One could interpret "trying anything funny" to be reasonably innocent, if not for that "Ew"...

There's also a trainer in the ocean near Bond Bridge in Leafgreen/FireRed that says after you beat her "I'm not wearing a bathing suit" or something along those lines.

Funny how she swims to you to battle you. Perhaps she's hitting on me.

Whatever the case, I keep talking to her to see if she says something besides "Go away!"

In D/P/Pt there's a swimmer lady that says 'Sorry for wearing my bathing suit!'
8) Nice...

Outside the Celadon City Gym, there is an old man peeking in through the window, who says, "Heheh! This GYM is great! It's full of women!" They aren't always so subtle with the pervy references!

Mr. Backlot says this to his butler when his butler corrects him on having a certain Pokemon in his garden:

"What are you saying? I'm no blowhard!"

That's what she said.

And, of course, the classic naming metapod "*****" then using harden. Hahaha so clever.

There's also the Bugsy's gender problems...

There's also always that one old lady who always wants you to keep spending the night resting at her house in the middle of nowhere. o_O

Another: In Janine's gym, there's one guy trainer dressed up as Janine but all the other imposters are girls.

And if this isn't just about nasty stuff, then there are some stuff that I bet kids don't comprehend when they play the games. The Pokemon games always have the mostly kiddy stuff, but some easter egg stuff that only an adult(/older teenager) could truly get.(ex: Old Man talking on Mt. Chimney Pyre about Kyogre and Groudon battling.)(that or it was just Cat being stupid or forgetting how easy that was to understand after looking back at it ;P)

And, of course, the fact that Ash is a frequent cross-dresser.

Wah-hah-hah-hah! Epic inuendos are epic. But, you gotta realize ;P There's alot of kids that play Pokemon, probably half of them wouldn't even realize them, those inuendos only a peverted teen/adult would notice ;P Says alot about this forum huh, guys/girls?