i think bs clause should be aplied like so:
you are staring at the lake like in the end of season 3 then suddenly arceus came from the sky saying: thank you my child for beating that imposter as a reward for your hard work i can bring back 1 of your fallen friends and then you choose ...
let's drop some fun facts for you:
if you didn't use the ocarina of time and went upstairs in the yureyu building, you would fight (patchy) sirius and later on at laura's house, you would fight siggy ...
i don't wanna spoil the rest just go back to your save file and replay it on your own (sh*t will happen on tanzan mountain), this game is crazy, just a choice can change the whole story