Can You Carry Mario in New Super Mario Bros. Wii? No – But Later Games Added It
You cannot carry Mario (or any character) in New Super Mario Bros. Wii.
Why
The game has no "pick up player" mechanic. Multiplayer is simultaneous co-op—each player controls their own character independently.
Characters can collide (bump, bounce off heads), ride Yoshi together (up to 2), or bubble (press A when dead/in trouble to float back to safety)—but not carry.
Games Where You Can Carry Teammates
New Super Mario Bros. U / U Deluxe (Wii U / Switch): Still no carry—but you can pick up and throw other players (shake Wii Remote / press R) in multiplayer. A key difference!
Super Mario 3D World / Bowser's Fury: Can pick up / throw other players (and Plessie).
Super Mario Bros. Wonder (Switch): Carry/throw teammates.
If you're playing NSMB Wii, use bubbles to save struggling teammates—not your arms.