WWF SmackDown!: Just Bring It

Go the route to Wrestlemania. During this route you will have a choice between three matches. Do this 3 times, choosing a different match each time. Win the match to unlock it once you finish the story.

Start story mode as anyone without a title. Tell Vince that you don't want to form a tag team. Talk trash and then say you want to kick his butt all over the arena. Go to the parking lot to find Vince. Win the match he gives you. Show up on stage when whoever is out there asks you if you're serious about the title. Win the match against that superstar. Lose the title match at Wrestlemania. Mick Foley will appear and make a Hell in the Cell match. Win the Hell in the Cell match. Mick Foley will now be unlocked.

Choose Slobber knocker mode. Be The Rock and defeat 18 wrestlers in the time limit. A new Smackdown! arena will be unlocked.

Start a story mode with anyone who doesn't have a title. Say that you don't want to form a tag team to Vince. Run down and attack( if you win you have an advantage in the next match. KO the opponent to win). Lose or win the match. Stay backstage and find Earl Hebner. He is near the vending machines in the lobby. Tell him you are going to get the hardcore title. Beat Rhyno backstage to win the title and unlock Rhyno.

To do this you need to unlock all the smackdown cards. If you have unlocked all the above then go through one of them again to get to Wrestlemania. You will unlock about 3 to 4 cards each time. Another way to do it is to defend a belt. Each time you defend you unlock a card. However when there are three cards left (Shane and Stephanie's cards included) you will need to go through story mode and win WWF title at Wrestlemania. Choose anyone who doesn't hold a title.
Tell Vince you don't want to form a Tag Team.

Talk trash.
Say you want to kick his ass.
Go to parking lot to find Vince.
Win match.
Show up on stage.
Win match.
Win match at Wrestlemania.

Start a story mode with anyone who doesn't have a title. Tell Vince you will consider forming a tag team. Find any partner and win the tag team TLC match. Tell your partner backstage that you will find a partner for the six man tag match ( after you tell him you will find the partner he asks if you trust him say you trust him). Got the hallway where the APA office is ( it is the one on the opposite side of the vending machines). Help Spike and Molly. Win the tag team table match that the Dudley Boys challenge you to. Win the title match that follows and Spike Dudley will be unlocked.

Start story mode with anyone who doesn't have a title. Tell Vince that you don't want to form a tag team. Talk trash on the mic and tell Michael Cole you were just messing. In teh next roaming session, go to Regal's office ( it is down the the stairs in the hallway before the vending machine). Say that you don't want the European title match. He will make you fight Tajiri. Beat Tajiri in the match to unlock him.

When you win the WWF title at Wrestlemania, you unlock 5 movies in Theatre Mode:
SmackDown! commercial.
Making Of SmackDown! commercial.
SmackDown!2: Know Your Role commercial.
Making Of SmackDown!2: Know Your Role commercial.
Credits.
"Dark Summit" trailer.
Recent greatest Smackdown moments.

This is unlocked when you win the WWF
Choose anyone who doesn't hold a title.
Tell Vince you don't want to form a Tag Team.
Talk trash.
Say you want to kick his ass.
Go to parking lot to find Vince.
Win match.
Show up on stage.
Win match.
Win match at Wrestlemania.