Started as "hey wait that's funny CyDra can bridge to Yummy" and now it's "wait is this good"
COMBO TUTORIAL
Your ideal combo starter is Cyberdark Realm. Activate it and add Cyberdark Chimera to your hand, which you can then Normal Summon, but make sure you do so using Realm's effect, so you can save your actual Normal Summon for if you need it. Next, Link summon Clockwork Knight using Chimera as material. This triggers both Chimera's GY effect and Knight's on-summon effect. If you have no Yummy monsters/level 1 monsters in your hand, you'll want to activate Chimera as Chain Link 1, so you can chain block it with Knight's effect. If you do have a Yummy/level 1, then activate Knight first and chain block it with Chimera.
On resolution, whichever way you go, the result will be the same: Chimera will dump Cyberdark Wurm to the GY, and Knight will send Realm from the field to GY to add Clockwork Night from deck to hand. Next, use Wurm's effect to dump Cyber Dragon Nachster to the GY, special summon itself, and add Realm back from the GY to your hand. Then, use Knight's second effect to target Nachster in your GY, tribute Wurm, then summon Nachster. And just like that, you have a Link-1 and a level 1 to make Cupsy★Yummy Way with. On summon, you'll add Cupsy☆Yummy and Marshmao☆Yummy (if either of these are already in your hand, feel free to add Cooky☆Yummy and/or Lollipo☆Yummy instead) and then discard Clockwork Night.
OBLIGATORY NIB CLAUSE: Cupsy Way will be your 5th summon, leaving you open to Nibiru, the Primal Being. That being said, it doesn't matter if they Nib you or not. If they Nib you here, Cupsy Way resolves and you get your 2 Yummys, you link the token into Link Spider, special summon Cupsy, and you combo continues as normal. If they don't, you banish your Clockwork Night, discard Realm, add Therion "King" Regulus, and then summon it, equipping it with any Machine in your GY. This is an omni-negate, so if they Nib you after this point, you can just negate.
Next, Link Summon Yummy★Snatchy using Cupsy Way as material, and use its effect to place Yummyusment★Acroquey on your field. Special summon Cupsy from your hand, and use its effect to add Yummy☆Surprise to your hand. Use these two Yummys to make Lollipo★Yummy Way, which will summon back both Cupsys from your GY, which you can use to Synchro summon Shamisen Samsara Sorrowcat. Next, Normal summon Marshmao, and use it and Sorrowcat to make I:P Masquerena. Use Sorrowcat's GY effect to return Cupsy Way to your Extra Deck to special summon it back from your GY. Finally, use Surprise to special summon Marshmao back from your GY, and Marshmao to add back your Surprise, ready to set on the field and end your turn.
This leaves you with the following end board:
- Mrashmao * Yummy (level 1 body to use with either Sorrowcat or I:P)
- Lollipo * Yummy Way (bounce to summon 2 Yummys from GY)
- I:P Masquerena (quick Link into S:P Little Knight or Gorgon of Zilofthonia)
- Shamisen Samsara Sorrowcat (quick Synchro into Merry Melffys)
- Therion "King" Regulus (sends itself to GY for omni-negate)
- Yummy * Surprise (an array of effects)
A couple of other notes:
- Make sure you use either I:P, Sorrowcat or Regulus as your first interruptions, as you won't have the space to use Lollipo Way's effect before using one of these
- If you don't want the Sorrowcat into Melffys interrupt straight away, you can just make I:P using the 2 Cupsy monsters summoned back off Lollipo Way's effect, and then use Snatchy's effect to make it on your opponent's turn
- Therion Discolosseum can be utilised to search for Regulus and bring him back to your hand after use, as well as the field spell itself being recyclable using Surprise
- Nachster can also be used to contact fuse with a monster in your opponent's EMZ to make Chimeratech Megafleet Dragon
- Despite being 1-of's, Chimera and Wurm can both get you to Cupsy Way on their own, but Realm is the starter that gets you to Regulus
- Forbidden Droplet is a great choice in this deck, especially if you get Regulus on the board, as whatever he's equipped with is a free sacrifice for Droplet's cost
I've really enjoyed putting this deck together and fine-tuning it - looking forward to testing it out properly!