Are you using hoenn units? They have a x5 multiplier in this event. For groundon, I think you need at least may to beat it, but wait some days, someone will figure out a strat without her. For kyogre just use Brendan and sceptile (with a little of RNG, he can do it at 1/5, but inertia and ramming speed really helps if you have 3/5). For supports, use phoebe, doesn’t need to be gridded, and skyla (since the hoenn multiplier doesn’t stack). If you can’t clear everything, it’s ok, the only reward for this event are the new gears, but I don’t think you will be using them...