IMO, scarf jirachi and (to a lesser extent) heatran are thrash.
EDIT: How does it "check" Arceus with flinchhax lol. +2 Silk Scarf Arceus does 47.4% - 56.1% to scarf Jirachi. Solid 2HKO with any hazards (ok not tspikes). LO does 50% min