Astro Boy

New and upcoming (2026 and later)

Out this year, or not out yet.

Nothing from this stretch is close enough to be worth putting in front of you.

The last five years (2021 to 2025)

Current, and all of it watchable now.

Transformers: War for Cybertron: Kingdom

2021 · 1 season · Netflix

NetflixNetflix Standard with Ads

Pokémon HorizonsPokémon HorizonsSonic PrimeSonic PrimeMobile Suit Gundam GQuuuuuuXMobile Suit Gundam GQuuuuuuXLEGO Ninjago: Dragons RisingLEGO Ninjago: Dragons RisingEdenEdenMarvel's Moon Girl and Devil DinosaurMarvel's Moon Girl and Devil DinosaurJurassic World: Chaos TheoryJurassic World: Chaos Theory

Five to fifteen years back (2011 to 2020)

Recent enough that everyone can still find it, old enough to be finished.

Transformers: Rescue Bots

2012–2016 · 4 seasons · Discovery Family

mecharobot

The Roku ChannelPlexToon Goggles

Beyblade BurstBeyblade BurstTransformers: Robots In DisguiseTransformers: Robots In DisguiseBig Hero 6 The SeriesBig Hero 6 The SeriesSonic BoomSonic BoomBen 10Ben 10Transformers: War for Cybertron: EarthriseTransformers: War for Cybertron: EarthriseTeenage Mutant Ninja TurtlesTeenage Mutant Ninja Turtles

Older than fifteen years (before 2011)

The back catalogue, where the closest match often is.

UFO Robot Grendizer

1975–1977 · 1 season · Fuji TV

mecha

Not streaming in the US

MedabotsMedabotsJapanese SpidermanJapanese SpidermanVoltron: Defender of the UniverseVoltron: Defender of the UniverseSuper Dimension Fortress MacrossSuper Dimension Fortress MacrossDoraemonDoraemonZoids: Chaotic CenturyZoids: Chaotic CenturyThe TransformersThe Transformers