[Awen Moonshine]

There are 4 levels of difficulty to raids and different sets of raid bosses in each of those levels (the rarer ones are in the higher tiers). There is also a 5th coded but not yet implemented tier which is rumored to be for legendaries when they are finally released.

That sucks that you've been sick. I hope you are feeling better now <3

Upgrade is used solely for Porygon at the moment but there may be more pokemon that will also use it in the future. The other items are; Sunstone for evolving Gloom into Bellossom and Sunkern into Sunflora, Metal Coat for evolving Oni into Steelix and Scyther into Scizor, Kings Rock for evolving Slowpoke into Slowking and Poliwhirl into Politoad and finally Dragon Scale allows you to evolve Seadra into Kingdra.

All the event Pikachu will keep their hats, even when evolved and after the event finishes ^_^ I have a set of both Pikachu and Raichu with each of the special events hats.