WimpyKid  Suggested by tbbtbbt 
WimpyKidCured  Suggested by the font 
WimpyKidDialogue  Suggested by tbbtbbt 
Diary Of A Wimpy Kid  Suggested by Ruchin 
Coop Forged  Suggested by MEGAKID III 

Check out 'Greg's Hand'. It's pretty similar.

It's not Greg's Hand though

in the book have two type of font,the main font is used on non capital letter of lower than two,the second font is used if capital letter is +2
the font is is created by jeff kinney
text a novel in cartoon is use first font

I know it's very old but I found the real font!
Check it out and let me know if it's what you were looking for

And here is the other font, the one from the speech bubbles

Let me know if this helped you.

Yeah, I had found them myself
They keep getting removed here for a reason...
However that obviously helps... for now...

Here is the font
(If this link is error check below one)

I found the font

Liar. you didn't find that. That was already found.

Yo, this guy STAN has posted the font on his itch.io, which you can download now.