Transformers

The idea here is to change the deck into a completely different strategy after side-decking to make people side deck wrongly and take advantages from that. This can also lead to ultimate confusion for your opponent when you go to game 3: He cannot be sure if he's facing the deck in game 1 or 2. I won't be advising you to use this in small tournaments where everyone knows each other. More suitable for regionals/YCSs and big tournaments.

First is the oldest deck on this blog: Chain Burn siding into Agent

Another possible side deck can be:
1 Genex Ally Birdman
1 Red-Eyes Darkness Metal Dragon
1 Luster Dragon #2
1 Wattaildragon
3 Hieratic Dragon of Su
3 Hieratic Dragon of Tefnuit
3 Hieratic Dragon of Eset
2 Hieratic Seal of Convocation

You got the idea now!

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Second, is my Tour Guide HERO deck [42]

Monster [13]
1 Stratos
3 Alius
3 Thunder King
2 Tour Guide
1 Sangan
1 Night Assailant
1 Gorz
1 Black Luster Soldier

Spell [16]
1 Dark Hole
1 Heavy Storm
1 Monster Reborn
1 ROTA
2 E - Emergency Call
2 Duality
2 Mystical Space Typhoon
3 Gemini Spark
3 Miracle Fusion

Trap [13]
2 Bottomless Trap Hole
2 Mirror Force
2 Compulsory Evacuation Device
2 Hero Blast
2 Dimensional Prison
2 Solemn Warning
1 Solemn Judgment

Extra:
2 Elemental HERO The Shining
1 Elemental HERO Escuridao
1 Elemental HERO Absolute Zero (in case you have Leviathan Dragon. Replace for whatever)
1 Secret card
1 Wind Up Zenmaines
1 Leviair
1 Giga Brilliant
1 Temtempo the Percussion Djinn
1 Leviathan Dragon
1 Photon Papilloperative
1 Maestroke the Symphony Djinn
1 Shock Master
1 Heroic Champion Excalibur
1 Adreus Keeper of Armageddon

Tour Guide:

• To make something you want for your Miracle Fusion: LIGHT or DARK (Brilliant),  FIRE (Zenmaines), but sadly I have no space for Nova Master
• Get back banished Thunder King/Stratos from Miracle Fusion, or Alius if you dead-draw Gemini Spark
• Extra solution for your opponent's cards: Temtempo for Zenmaines/Gantetsu/Acid Golem, Zenmaines for defense, Leviair to steal Wind Up Rabbit
• For easier side-decking (see below)

Side deck:
3 Wind Up Rabbit
3 Wind Up Rat
3 Wind Up Shark
3 Wind Up Magician
3 Wind Up Factory

And the secret card was Zenmaity xD Predictable right?

Siding out:
1 Stratos
3 Alius
3 Spark
3 Miracle Fusion
1 ROTA
2 E Call
2 Hero Blast

The idea is to hope your opponent side out Veiler/Maxx Cs. As simple.
Bottomless/Torrential may be taken too because no one wants Gemini Sparks to create pluses for me

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And, lasly:

YOLO HERO [41]

Monster [7]

2 Card Car D

1 Stratos

1 Alius

3 Bubbleman

Spell [23]

3 Mystical Space Typhoon

3 Night Beam

1 Dark Hole

1 Heavy Storm

1 Monster Reborn

1 Book of Moon

1 ROTA

2 E - Emergency Call

2 Duality

2 A Hero Lives

3 Warrior Returning Alive

3 Miracle Fusion 

Trap [11]

2 Bottomless Trap Hole

2 Compulsory Evacuation Device

2 Torrential

2 Call of the Haunted

2 Solemn Warning

1 Solemn Judgment

Extra deck is quite easy to build this time

Side:

2 Elemental HERO Prisma

2 Gladiator Beast Laquari

2 Gladiator Beast Darius

1 Gladiator Beast Equeste

1 Gladiator Beast Murmillo

1 Gladiator Beast Retiair

1 Gladiator Beast Bestiari

2 Gladiator Beast War Chariot

3 Test Tiger

Siding into YOLO Gladiator Beast!

Out:

1 Stratos

1 Alius

3 Bubbleman

2 E - Emergency Call

2 Miracle Fusion

3 Warrior Returning Alive

3 more cards of your choice, maybe MST/Night Beam.

Keep the Card Car D and Call because you'll need it. Miracle Fusion will serve as a tech card to abuse the fallen Stratos/Prisma. Just don't forget to add Absolute Zero and Nova Master in extra deck because if you have Stratos played, Miracle Fusion is never dead with Laquari/Murmillo around

Siding into a control deck is the idea now. In fact Veiler can hit Gyzarus but 2400 ATK is still big and you can trade it with Megalo and then Call of the Haunted'd it back for a +3

I know this GB is weak at defense so just gather your resource before YOLO. Even with a set up field you can easily get comeback'd because meta decks are too fast when you are defenseless.

Of course you can do the reversed thing: Use the side as your main deck and such...

So that's for today, thanks for reading xD