Ahh, the elusive playground rhyme. Of course, there are like nineteen million different versions of it. Some that go into detail over exactly how Eevee's seven sisters pick on him (Eevee is generally acepted as a chubby, wussy little kid who isn't good at much), there is a Kanto version that leaves out everyone but Vaporeon, Jolteon and Flareon. Some versions Jolteon is either heavily muscled or has a sailor tattoo, all the sisters are afraid of Flareon, Glaceon's exploits are more exaggerated and so on and so forth.
Eevee's Seven Sisters - Solaceon, Sinnoh
Eevee had seven sisters,
As pretty as can be
Eevee has seven sisters
Count down at 1, 2, 3!
One! Flareon is firey-tempered,
She may burn you on a whim
Two! Jolteon is really manly,
So you shouldn't mess with himAa
Three! Vaporeon's a graceful dancer,
She can charm you if she tries
Four! Umbreon's a necromancer,
Never look her in the eyes
Five! Espeon's a famous gossip
Tell your secrets all through town
Six! Glaceon gives chilly kisses,
Heard she really gets around
Seven! Leafeon is kind of quiet,
She likes reading in the rain
Eevee has seven sisters
Let's count them down again
Eevee's Three Sisters - Kanto, Saffron City
Eevee had three sisters
They pushed him on the floor
They gave him seven wallops
And gave him seven more
Jolteon used Pin Missile
Vaporeon used Water Gun
And Flareon stepped on his legs
Just so he couldn't run
Piece of pie,
Piece of cake
How many bruises did they make?
1, 2, 3, 4....