>sunsteel strike/monngeist beam marshadow
They didn't star in a movie together.
Some possible examples, counting past movies and event moves that have come out since then:
>Precipice Blades Jirachi (Movie 6)
>Dragon Ascent Deoxys (Movie 7)
>Origin Pulse Manaphy or Heart Swap Kyogre (Movie 9)
>Shadow Force Shaymin (Movie 11)
>Night Daze Raikou/Entei/Suicune/Celebi (Movie 13)
>Glaciate Keldeo (Movie 15)
>Psystrike Genesect (Movie 16)
>Geomancy/Oblivion Wing Diancie (Movie 17)
>Hoopa with anything (Movie 18)
>Fleur Cannon Volcanion or Steam Eruption Magearna, but I feel like these are both too out there (Movie 19)
>Sacred Fire Marshadow (Movie 20)
>Aeroblast Zeraora (Movie 21)
>Psystrike Mew (Movies 1/22)
Some of these might be pretty busted though.
