Ask about frame data for characters in Super Smash Bros. for Wii U! Name any character (e.g. Mario, Link, Mewtwo) and move (e.g. up tilt, forward smash, down special, back roll) and the skill will describe its active frames and when the character can act.
If you're not familiar, here are a few links on frame data and why it's important: https://smashboards.com/threads/why-does-frame-data-matter.425369/ https://www.reddit.com/r/CrazyHand/comments/5k2gy8/why_is_it_important_to_understand_things_like/ https://aminoapps.com/c/smash/page/blog/the-importance-of-frame-data/kWfG_u4rXbm7MgKeDod1eKYDvn7oQP