Beating the Pokèmon League in Sapphire with a lvl. 77 Swampert, lvl. 67 Walrein, lvl. 51 Linoone (AAAAAAA), and lvl. 39 Golduck because I heard Cloud Nine was really handy against Glacia, who's Hail Pokèmon really scared me. Besides killing Kyogre because I had already used my Master Ball on a Skarmory, that's all I remember about Sapphire.
Oh, and only having a Swampert and Linoone until I caught Spheal because I didn't know how to catch Pokèmon.