I already posted this before but here are basically the translations for the Geno related entries in Sakurai's journal:
Entry number 14:
This guy speaks fondly of Super Mario RPG, how he loved it as a kid, and even after 10 years, it's still his favorite game of all time. He then requests Geno, gives a brief description and explains why he'd like Geno in the game. He then basically says, and God love him for saying it, "Because you (referring to Sakurai) are such a nice guy, I'm sure Geno's already in the game and you're just not telling us."
Entry number 86:
This one isn't all the different from the one above. He talks about his long history with SMRPG and how "like an oak tree, my love for this game has grown more and more with each passing year." He then requests Geno and tells Sakurai what qualities he likes about Geno's character.
Entry number 247:
This one's funny. This guy requests Geno and then asks Sakurai what his favorite drink is. He then tells Sakurai what his is and that's that. (I think he was expecting an immediate response or something.

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Entry number 268:
For most of this entry, this guy goes on and on about why he loves the Ice Climbers and hopes that they return. Later, he requests Geno and Mallow for Brawl. He basically says "they are so unique that I'm sure many people would love to play as them."
Entry number 276:
This guy's pretty long winded like the previous guy was. He talks about how much he loved the Brawl's main theme and can't wait to hear how the rest of game's music sounds. He's utterly blown away about how much potential Brawl has music wise sense so many people and franchises are going to be involved. He then requests the tune "Forest Maze" from SMRPG. He talks about why he loves the theme but he's a little considered about whether or not it'll make it since Square Enix owns it. After that, he then basically says, "since it wouldn't make much sense to just add the tune to the game, why not make Geno a playable character too?"