For a Synchro Summon, you can substitute this card for any 1 "Synchron" Tuner monster. Once per turn: You can discard 1 card, then target 1 non-Tuner "Junk" monster in your Graveyard; Special Summon that target, and if you do, immediately after this effect resolves, Synchro Summon 1 Synchro Monster that lists a "Synchron" monster as a Tuner, using that monster and this card only. These Synchro Materials are banished instead of being sent to the Graveyard.
Anything summoned by Junk Synchron has its effects negated.
However, I'm stumped here because from what you said there, and the screenshot, looks like there doesn't seem to be anything that negate Junk Anchor's effect. Junk Warrior should be able to be revived and then used as material for Junk Berserker.
Level checks out, material checks out, so I don't know what's the issue.
I doubt it's a bug. (It probably wouldn't say Anchor's negated, it'd just not Summon anything.) My guess is either you Summoned it with Junk Synchron, or a continuous effect like Gorgon's Eye or Destiny HERO - Plasma negated it.
Still say Junk Synchron's the likely culprit, since I'd expect you used Junk Synchron + Junk Warrior to Summon that Stardust.
Did you actually have a monster you could Synchro Summon with its effect? (IE, Junk Warrior with a Junk Forward in Graveyard, or Junk Berserker with a Junk Warrior in the Graveyard.)
So I have junk anchor on the field and junk breaker in the grave and cards in my hand, but the game won't let me use anchors effect. I have junk warrior, then leveled up anchor and still won't work for stardust. Help?
Ok so I used this cards effect to discard a card then special summon Junk Forward to the field but it did the negate animation. Any ideas? I had a Junk warrior in my extra deck btw so I should have been able to SS him