Here are some Grammatical Mistakes/Bugs I've found:
Pic 1: It should be: I don't want it.
Pic 2: The "i" is not "I".
Pic 3: It should be: Now, try to be a Trainer and battle me.
Pic 4: You can walk through that tree.
Pic 5: No music, and the text isn't changed yet. Why? I've thought that Wally's going to teach you how to catch Pokemon, instead of asking you on how to catch it.