not sure if its the pokemon theme song but she did teach him anpanman march. idk where you got pokemon theme song. considering japanese theme song and English one are completely different. the anime song was anpanman's march
no they are not these for most part are fan artists basically
these are not canon well except for the one at the end of vol 1 dealing with liz drawn by suzuka. these are done by different artists. its basically fan art in a way but being sponsored and done for tobooks
actually i listened to rabbit sounds and it sounds like some of the ones they make. tho i Believe where i watched it said it was a chirp. the ln said chirp pooey tho the anime did say squeak but it said squeak pwee in the subs and he went on poking her and it for abit. so the sound is accurate...