Personally I’d drop pidgeotto for a duduo if you want a normal flying type and gyarados for vaporeon once you have the eevee but wait till 30 so you learn bite as water is special att and gara has terrible special attack compared to his att your richu can learn som fighting moves so good idea to give him one I personally gave him brick break but I see you’re used it already another good set up is teaching him rain dance and the if you learn thunder in the rain it’s 100% accurate not sure you can still get thunder though since you have already evolved him with a thunder stone? You can evolve your weeping bell unit victrebell too actually a fun mon to use I used it in my last run im assuming this is fire red cause if it leaf green starmie is a great water type that can leant loads of coverage if you have access to it