This is from the 4th Captain Underpants book. Basically, you use the first letter of your first name to get your new first name; and the first and last letters of your last name to get your new last name (first letter for first half, last letter for last half).
FIRST NAME
A = Stinky
B = Lumpy
C = Buttercup
D = Gidget
E = Crusty
F = Greasy
G = Fluffy
H = Cheeseball
I = Chim-Chim
J = Poopsie
K = Flunky
L = Booger
M = Pinky
N = Zippy
O = Goober
P = Doofus
Q = Slimy
R = Loopy
S = Snotty
T = Falafel
U = Dorky
V = Squeezit
W = Oprah
X = Skipper
Y = Dinky
Z = Zsa-Zsa
FIRST HALF OF LAST NAME
A = Diaper
B = Toilet
C = Giggle
D = Bubble
E = Girdle
F = Barf
G = Lizard
H = Waffle
I = Cootie
J = Monkey
K = Potty
L = Liver
M = Banana
N = Rhino
O = Burger
P = Hamster
Q = Toad
R = Gizzard
S = Pizza
T = Gerbil
U = Chicken
V = Pickle
W = Chuckle
X = Tofu
Y = Gorilla
Z = Stinker
LAST HALF OF LAST NAME
A = Head
B = Mouth
C = Face
D = Nose
E = Tush
F = Breath
G = Pants
H = Shorts
I = Lips
J = Honker
K = Butt
L = Brain
M = Tushie
N = Chunks
O = Hiney
P = Biscuits
Q = Toes
R = Buns
S = Fanny
T = Sniffer
U = Sprinkles
V = Kisser
W = Squirt
X = Humperdinck
Y = Brains
Z = Juice
Mine is, rather appropriately, Loopy Bubblehead. XD
