Here is the Post-Credits Scene in Team Robot in Pokemon: Diancie & The Cocoon of Destruction.
(After the End Credits, Primus and the Other Villains Appears in the Allearth Forest)
Primus Onslaught: Hello! Is anyone there, hello?!
(But no one can hear them)
Primus Onslaught: (sighs) I can't believe those fools lost to them, hello?!
Natalia: Those Lousy Americans and their friends is getting on my nerves!
Myotismon: Somebody explain something!
Frollo: I think they're hiding something.
(They can't hear them)
Primus Onslaught: (Sighs) Fine, if it's done right, we'll just do it ourselves.
Hans: Look over there.
Yokai: Where?
Ice King: Uh, over there.
(As they Continue walking, they sees the cliff)
Primus Onslaught: Hello, fine. I'll deal with them ourselves.
Natalia: Let's go.
(They walked to the waterfall and see Argus' Airship still crashed into the lake)
Hans: What is that?
Primus Onslaught: A crashed Airship, wonder how did that happened?
Natalia: Mal! You foiled again this time, but I'm getting Started.
Myotismon: Well, what did we know?
Vexus: Now we gotta plan.
Shredder: Go ahead Scan.
(Primus scans then completes reveal the data of a Mythical Pokémon)
Natalia: Excellent timing.
Vexus: What is that thing?
Shredder: That's Hoopa.
Natalia: (She hears her two way radio) Yes, Tirek. We lost them. Yes Primus has scan a Mythical Pokémon.
(We cut the scene to Tirek Hears Natalia with his two way radio alongside The Dark Masters)
Tirek: Yes, indeed and I have the Dark Masters right here.
Piedmon: (Silhouette) Hello, Natalia is going well.
MetalSeadramon: (Silhouette) Yeah, we think so.
Puppetmon: (Silhouette) The Russian spies are doing really well.
Machinedramon: (Silhouette) About Hoopa. If we use Hoopa we will be able to destroy the heroes and the DigiDestined too.
Ratcliffe: Like a pawn to king!
Tirek: Head to the desert city and find that prison bottle.
(We cut the scene to Natalia and the other villains)
Hans: Is there any ideas?
Primus Onslaught: Yes there is one way-
Natalia: Goodbye. (She turns off her radio)
Primus Onslaught: Natalia. What does Tirek want?
Natalia: He says he's going to bring more villains to help us out, capture the Prison Bottle to possess Hoopa and destroy Team Robot, Primus.
Primus Onslaught: Perfect, now all we gotta do is go to Desert City and find that prison bottle and destroy Emerl and his Team Robot once and for all.
Myotismon: Then let's go.
(As they leave)
The End.