Battle Chip Gate

A Battle Chip Gate (バトルチップゲート) is a device created by Capcom and Takara to be used with toy PETs and in games from the Mega Man Battle Network series. Unlike the PET, Battle Chip Gates don't feature any kind of interface or the ability to house a NetNavi; instead, they can only be used to transfer Battle Chips to remote NetNavis, even NetNavis that don't belong to the operator.

Note that the Battle Chip Gate, Progress Chip Gate, and Beast Link Gate and their toy Battle Chips aren't compatible with each other.

The gates themselves have only ever appeared once in the games themselves as a poster in Higsby's.

Battle Chip Gate
The Battle Chip Gate is an accessory created for Mega Man Battle Network 4. It can be connected to the Game Boy Advance and allow the player to transmit real-life toy Battle Chips to the NetNavis in the game in Operation Battles. The Battle Chip Gate can also be used with toy Advanced PETs and in Rockman.EXE 4.5 Real Operation.

Progress Chip Gate
The Progress Chip Gate (プログレスチップゲート) is a redesigned Battle Chip Gate released to be used with Mega Man Battle Network 5 and the Progress PET.

Beast Link Gate
For Mega Man Battle Network 6, Rockman.EXE Battle Chip Stadium and the Link PET, the Battle Chip Gate would again be updated, this time to the Beast Link Gate (ビーストリンクゲート). These devices have the same use as their predecessors but come in two styles representative of the Cybeasts Gregar (Glaga) and Falzar (Falzer).

Anime
In the anime MegaMan NT Warrior, the Battle Chip Gate is also used to send Battle Chips to humans who are transformed with Cross Fusion or remote Navis, or to even activate Battle Chips that don't require a NetNavi for the effect (such as field-altering Battle Chips like RockCube (which can still crush opponents) or Grass Stage instead of swords or projectiles. Although, it can still activate certain offensive chips like Flame Tower, MiniBomb, and TimeBomb, or even use certain Battle Chips to summon their virus counterparts, e.g. Cannon summons Canodumb, Guard/Shockwave summons Mettaur, Life Aura summons Scuttlest, DashAttack summons Fishy, Train/Trident Arrow summons Piranha, etc. Sword Chips have never been activated on their own by the Battle Chip Gate.

The Progress Chip Gate appeared in Rockman.EXE Stream.

In Rockman.EXE Beast and Beast+, Beast Link Gates are used as PETs by the residents of the parallel world Beyondard, regardless that they lack of an interface for viewing the NetNavis they house.