Yes, it can baton pass Speed and Attack to others.
One of the bests. Speed Bost and Swords Dance combo is one of the most used Baton Pass strategies, this can be used too with a Ninjask or a Scolipede.
Remember when you use Baton Pass, priority moves can hit you, so careful.
Mega Blaziken has Speed Boost but loses the chance to hold Focus Sash or other items.
Blaziken can pass all those changes with Baton Pass: Critical-hit chance (Focus Energy) / Attack (Swords Dance) / Defense (Bulk Up) / Accuary (Hone Claws) / Evasion (Double Team) / Substitute / Speed (Agility, Speed Boost) / Sp.Atk (Work Up).
Here is a great moveset for a Baton Passer Blaziken :
Blaziken @ Focus Sash
Ability: Speed Boost
EVs: 252 Atk / 252 Speed / 4 HP
- Swords Dance (or any other boosting moves that you see above)
- Baton Pass
- Any move
First go with a Protect. Your speed will be increased by x1.5, then use Swords Dance, if the move OHKO you, Focus Sash will activate. Then Protect depending on what Pokémon you challenging (if he have a priority move, your strategy is ruined) and your speed is increased to x2.5 (already increased to x2 when using Swords Dance) and then if all goes great, use Baton Pass to a great sweeper, a Pokémon that has high Attack stat and a several differents moves.
Hope this helps.