Yeah, uh,
@Omicron, if it has materia growth, it ain't the ultimate weapon for someone. They all have 8 materia slots, all of which are paired, they all (bar Aerith's) have zero materia growth, and they all have unique damage mechanics. Tifa's keys off her limit gauge and Yuffie's off enemy level, for example. Aerith's got stronger if allies were KO'd.
Which reminds me:
Regarding the Ancient Forest:
The flies and frogs aren't given to the carnivorous plants. Those get fed beehives, and the one on the first screen is just there to force you into trying the
other path.
The flies and frogs are fed to the hanging blue pitcher plants.
If you feed them flies, they'll close up and you can jump on top of them (for a limited window -- they'll eat the flies and open up again, so it's wise to pre-position all the ones you'll need for a long sequence). If you feed them frogs, they'll still close up and try to eat the frog, but instead of managing it the frog will escape after a bit, and if you're standing on the plant when that happens you'll be catapulted to a new location.
It might be worth looking up a guide, TBH.
But one of the things you can find in the forest is a
triple AP weapon for Cloud. It has good attack stats, too. If you want to master materia, double/triple AP gear is the way to go.
Cloud, Cid, and Vincent have the best general-purpose materia-levelling weapons; Cid gets the only other triple AP weapon with the Scimitar, and his Javelin is the best double AP weapon in the game since it has five slots, good attack power,
and it has paired slots. Unfortunately both the Scimitar and Javelin can be missed, since the Scimitar is in the Underwater Reactor and the Javelin is in Gaea's Cliff.
Vincent's Buntline has worse attack but still gets four paired slots.