[Critical] Trainer parties are currently broken.

[Jaizu]

Tested on dev_1.x branch
I think this might be happening due to some switch logic changed recently, I think he's switching out to his next pokémon + 1.
I changed the sParty_Rick to:

static const struct TrainerMonNoItemDefaultMoves sParty_Rick[] = {
    {
        .iv = 0,
        .lvl = 9,
        .species = SPECIES_WEEDLE,
    },
    {
        .iv = 0,
        .lvl = 9,
        .species = SPECIES_KAKUNA,
    },
    {
        .iv = 0,
        .lvl = 9,
        .species = SPECIES_CATERPIE,
    },
    {
        .iv = 0,
        .lvl = 9,
        .species = SPECIES_METAPOD,
    },
};

Gif:

Save:
pokeemerald.zip