Hi! Seems I'm the first to do troubleshooting in the new year, yay.
Often, not always, when I battle after being offered to do so, the game crashes. Not sure if it's needed, but here is the save.
Game_3 - 11 - Yasu - 1h 6m - 0 badges.rxdata
UPD: I've learned to press skip button when asked for a fight. Somehow it resolves possibility of crashing and the game proceeds normally.
On the other hand, I've got another error: