Forgive me for my english
I have already looked on some youtube channels , about animes shown in Greece or tried Google , typing some keywords , but no results
1) The first anime is about a sister and a brother (normal animated characters) , half androids , using a drill-vehicles vs huge 3D monsters (like the current power rangers - bosses animation , or normal ppl wearing costumes , destroying small carbon cities ) .
When they wanted to kill the boss , they had to <<synchronize>> , where the male had half blue-half pink (i think) color , driving the vehicles , while the sister appeared as a ghost (black form) at the back of it , suply it with energy .
At the end , the drill-vehicle , used some side wings , fly and pierce the monster , creating a big hole in his stomach > exploding itself .
2) About the second i dont have many memories
Its about a huge rombot , used to guard and protect a train , traveling throught space full of orphan children , from Earth .
With the ability to , <<connect>> to the train , and destroy the alien-enemy fleet , piercing them , like a huge snake .
Sorry for wasting ur time guys