I got this from the "Fetch! With Ruff Ruffman" website. Here's all the info on Rubye from Season 5:

Pet profile:
Rubye has five pets! Count 'em: a dog, a bird, a cat, and two fish. She even trained her dog Emma to beg on her hind legs! Okay 狗 do not beg—we just whimper a little.

Nicknames:
Rukanuba, Rubert, Rub-Rub, Rubsu, and Rubbie

Sibling status:
Rubye has an older sister.

Favorite foods:
One of Rubye's 最喜爱的 things to eat are her grandmother's pickles. Mmm, nothing like home-pickled treats from Grandma.

Superhero persona:
Rubye would like to fly AND be in two places at once. Her top-secret...

I got this from the "Fetch! With Ruff Ruffman" website. Here's all the info on Marc from Season 5:

Pet profile:
Marc has two guinea pigs, two fish, and an 18-pound cat named Fluffy who likes to drink out of toilets. (Blossom would not approve.)

Most 最喜爱的 subjects:
Language arts and math

Nickname:
One of his teachers started calling him "Marcski" and then all the kids at school did, too. Good thing he likes it!

Hobbies:
Marc plays video games, collects comic books, surfs, swims, and likes to dance.

Future invention:
Marc wants to invent an inexpensive machine to filter seawater and turn it into drinkable...

I got this from the "Fetch! With Ruff Ruffman" website. Here's all the info on Marco from Season 5:

Pet profile:
Marco has three 狗 and four cats. He claims one of his 狗 will eat anything! Okay, one liver and pineapple 饼干 shake to go!

Sibling status:
Marco has an older sister, stepsister, and stepbrother.

Nickname:
Frongi, because it's part of his name

Food facts:
Some of his 收藏夹 are Italian wedding soup, his dad's pizza, and broccoli. But don't give him spicy 食物 unless 你 have a 火, 消防 extinguisher handy!

Hobbies:
Video games, building things, skateboarding, acting, and listening to...

I got this from the "Fetch! With Ruff Ruffman" website. Here's all the info on 松鸦, 杰伊, 杰伊 · from Season 5:

Pet profile:
Jay's dog is named after rock 星, 星级 Lenny Kravitz! And his cat Mittens is named after... a pair of mittens. Naturally, only the pooch gets the rock-star treatment.

Most 最喜爱的 subjects:
Computers, math, and science

Family matters:
Jay is an only child. He's also the godfather for his cousin's baby! Impressive.

Hobbies:
Playing guitar, learning how to build Web sites, and sailing. Plus he's the lead singer in a rock band! Ooh, can I get an autograph?

Special talents:
Jay is a really good cook...