|**Pluto Chronology**|||||

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|Marvel Age Introductions by On-Sale Date|||||
|1966|FEB 3|THR127A|Mighty Thor|[Pluto] [Hippolyta] xo[Hercules][Loki][Warriors Three][**INTRO**Pluto][Hippolyta]|
|1966|MAR 3|THR128A|Mighty Thor|xo[Hercules][Loki][Pluto] [Hippolyta][Warriors Three]|
|1966|APR 5|THR129A|Mighty Thor|[Ares] [Artemis] [Hephaestus] [Hera] [Hermes] [Tana Nile] xo[Hercules][Pluto][Warriors Three]|
|1966|MAY 3|THR130A|Mighty Thor|[Crusher] xo[Hercules][Warriors Three][Pluto][Tana Nile]|
|1969|FEB 4|THR163|Mighty Thor|[Pluto][Sif]|
|1969|MAR 4|THR164|Mighty Thor|[Athena][Pluto][Sif]|