You know you've played too much pokemon when...

[The Macintosh Ninja: SOH CAH TOA]

You walk exactly one way in four directions. 

There are only 8 sprites for your movements.

["Alvin"]

You buy a 5 pocket backpack, and label each pocket with KEY ITEMS, BERRIES, ITEMS, POKé BALLS and TMs & HMs.

[wingedsorcerer]

When you just walk into innocent peoples houses

[BYRON]

When you take things from the houses of the aforementioned people. Without asking,

When you take such things, you feel compelled to say 'Doo doo doo doo DOO!'.

[Mushroom]

When you take such things, you feel compelled to say 'Doo doo doo doo DOO!'.

That's more a "You Know You've Played Too Much Zelda When..." Kinda thing. Not a Pokémon reference at all.

[rapidash-mike]

That would be better put as when you take something you want to say: Dun dundun dun dundun dun DUN!

[Victor Niguel]

When you call a butterfly a beautifly.

When you call a microscopic biological consumer a Gulpin.

That's what I did.

[rapidash-mike]

When you dye your pet mouse's fur yellow with black stripes and red cheeks. o.o

[Victor Niguel]

when you dye your pet mouse in shades of orange with brown stripes and yellow cheeks.

[~Feebas~]

when you name your hamster bippa and throw it at a passing dog
when you see two kids playing tennis and steal all the balls
when you pick all the berries of a bush and look for a sign saying 'loamy soil'

[Dracon]

That's more a "You Know You've Played Too Much Zelda When..." Kinda thing. Not a Pokémon reference at all.

No, silly, if it was zelda, then it would be, DOO DOO doo do DOO do DOO doo DOO doo.

[Poetictouch]

When a dog runs up to you barking and you say '<Insert Name Here> USED REPEL!' and spray the ground with your dad's old D&O (deoderant)

[Utack and Swampy]

When you start talking to giant mudfish that arn't really there and people stare at you because of it...Why can't you people see him!?!?!?

["Alvin"]

When you wear repellent whenever you enter tall grass, because you have no POKEYMAN to defend you.

[Pokeapache]

When you start to throw stuffed animals and the evil maneatting dog next door and hoping that it'll be destracted enough for you to run through the lawn safetly.