Cookie Butter
formerly the someone
Not very creative to use literally the same thing twice, is it? Anyway...diceus is a cool idea that encourages creative teambuilding, I'm not entirely sure why it would need to be banned just for breaking species clause and being good with OP mons which are getting banned anyways.
Diceus is the 94th in highest HP. The fusion with lowest HP is 506th, excluding all forms. There are (506-94=) 412 fusions that Diceus could turn into, and be better than them because of HP. It's not just "good with OP mons", it's good with +80% of the fusions and god knows how many Realmons. But the question is, would it be worth using two of the same mon to have a slightly better version with higher HP? If the original mon has base 100 HP and the increase is only +4, then no. If the original mon has its HP stat almost doubled on Diceus, then yes it's worth using. Examples:
Diceus-Sickle gets 104 HP/175 Def/165 SpD (goes from 55 to 104).
Diceus-Sablemimez gets 104 HP/80 Def/102 SpD with an ability that halves all damage (also goes from 55 to 104).
Diceus-Miminja goes from 63 to 104. Since it gets +50% HP from the ability, it ends up with the equivalent of 207 base HP (104 base HP with EVs is 412, 150% of 412 is 618 = 207 base HP with EVs). Not sure if Miminja is going to the bottom of the fusion list in this slate, but if it doesn't, then we're fucked.
Diceus-Cosmill can also end up incredibly broken, if Cosmill's ability somehow doubles HP (it does say "doubles all stats" so idk). The HP stat would be so high that it would be above base 255.
Other less broken versions are Diceus-Pelippex (104/136/116 bulk), Diceus-Aegiline-Shield (104/132/132), Diceus-Maskle (104/156/166), Diceus-Miniancie-Ore (104/145/145), Diceus-Shuckle (104/230/230 bulk with shit abilities), Diceus-Aegislash (104/150/150), etc
Oh and let's not talk about Diceus-Shedinja.
Multitype is affected by Z-Crystals now, the ability is based on it so it should be able to use any Z-crystals.One thing that i've noticed that makes it balanced it's the fact that it must wear a Plate for making its ability useful, leaving without the ability of using any other and more useful item, so in my opinion is balanced :]
Also, assuming it defaults to Normal-type with no item, then we get double-trouble Diceus-Ditto which is going to have better bulk than the other fusion 80% of the time and can use Scarf. Zycannon with +37 HP doesn't sound fun either. Ah and the good old Diceus-Bunny-(insert literally any mega stone OR Eviolite OR Ultranecrozium Z here).
If it doesn't transform into Normal-types by default that's too bad. Bunny and Ditto strategies wouldn't work, Zycannon would though.