I spent some more time training my LeafGreen team yesterday. I rematched a whole bunch of trainers throughout Kanto and the Sevii Islands. Eventually, I got my remaining team members to level 75. Then, I decided to do some additional training against the Elite Four. I mostly focused on levelling up my Gengar during this E4 run. Thanks to the Lucky Egg + boosted experience from being traded, my Gengar had reached level 83 when I was done.