What should I choose a lvl 49 charizard or lvl 50 moltres And Lvl 49..

I'll say Charizard. If your going to the Pokemon league then you need more training.

Give Charizard this move sets for starters. Flamethrower,irontail,Fly and slash/strengh/blast burn.. Thats move sets will be handy if you don't have a cheat device. but if you do have a cheat device then give him: flamethrower,earthquake,dragon clae and aerial ace.

Pick Zapdos, electric Pokemon are weak againts ground type Pokemon, but since zapdos is flying it has an advantage but his weakness is rock and ice.

Me I would stick with Charizard and Raichu.

Char is better than Moltres anyday. Easy pick there.

Zappy better than Rai. Dependin' on what set either have.

~SGX

I Would Stay With 49 Charizard and 49 raichu If That Dosent Go With charizard and Zapdos or zapdos and Moltres.

Charizard and Zapdos dude!

Moltres gets better moves without the having to win famethrower for it from crystal gamecorner or stadium2 and then Trade back like the original game red version , you don't have to do that now so theirs no extra special reason to use it anymore over moltres and anyway moltres is going to have higher base stats , I would suggest doing the event for ho oh and using that other then any of them above as t gets shock wave or thunderbolt aswell as sacred fire /fireblast and earthquake and then yo don't need to waste a whole slot just to be able tohit hard with thunderbolt and then you wont have to switch out from Zapdos either when you want to use a fire attack and it gets giga rain too which is great for water types, , then you can fill the blank on your eam with dark , rock or psychic type that's if your team doesn't have 1 , I'm just thinking about the common casual players that always just use a plant like a bellsprout , a water Pokemon like seel or shellder with ice attacks , a fire Starter and a raichu which everyon uses til they rech jkoga and can Surf to get zapdos then they use Articuno as a Fly slave and box off spearow fo a team space this is where most go for gengar or umbreon if they are clever anyways , I would put tyranitar from Emerald in the extra space you get but most casual players don't even get gengar cause they don't buy 2 systems or any system aall and just emu and hack like the jokers they are , no way to play pokemon

For Pokemon let’s go I would say Charizard and he can Fly.

Really dude, (ID #700513), 13 years later!!!
He is clearly not asking for Pokemon Let's go!!