Dummies big day is a game mode where you get to play as an all new legend, the dummy. Everyone on your team gets the same abilities. Speaking of which…
Tactical: shoots a attachment or heal from their finger
Ultimate: kinda random. It has many outcomes. Sometimes it heals people, sometimes it sends out decoys, once I got a piñata, which seemed to have dropped loot from the sky. Takes 200 seconds to charge, which is 3 minutes and 20 seconds, and 2 seconds for 1 percent.
Passive: we are really god damn proud of you. Has no effect.
Additional notes: Does not have a voice actor. What I I’ll usually be said is on the side of the screen. On the legend select screen, you can choose the dummies color.-
Challenges: Play one match, activate 3 ultimates, win a match, which gets you a grand total of 1000 arcade points.
Source: https://www.reddit.com/r/apexlegends/comments/euah5k/dummies_big_day/